{"id":4981,"date":"2026-05-28T09:29:38","date_gmt":"2026-05-28T09:29:38","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4981"},"modified":"2026-05-28T09:29:40","modified_gmt":"2026-05-28T09:29:40","slug":"ceramic-pcb-design-manufacturing-guide","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/da\/ceramic-pcb-design-manufacturing-guide\/","title":{"rendered":"Keramiske printkort: Komplet guide til design og fremstilling"},"content":{"rendered":"

Hvad er et keramisk printkort?<\/h2>\n\n\n\n

Et keramisk printkort bruger et uorganisk keramisk substrat i stedet for traditionelle FR-4<\/a> glasfiber. Almindelige substratmaterialer er aluminiumoxid (Al\u2082O\u2083), aluminiumnitrid (AlN) og berylliumoxid (BeO). Disse plader leder varmen langt bedre end organiske laminater. De kan ogs\u00e5 modst\u00e5 temperaturer p\u00e5 op til 350 \u00b0C for standard aluminiumoxid og endnu h\u00f8jere for SiC. Ingeni\u00f8rer v\u00e6lger keramiske printkort, n\u00e5r de har brug for h\u00f8j varmeledningsevne, stabil elektrisk ydeevne ved h\u00f8je frekvenser eller en varmeudvidelseskoefficient (CTE), der matcher siliciumchips. I mods\u00e6tning til printkort med metalkerne har keramik ikke noget isoleringslag mellem komponenten og det varmespredende materiale. Komponenterne sidder direkte p\u00e5 keramikken, hvilket reducerer den termiske modstand. Denne direkte vej holder forbindelsestemperaturerne lave og forl\u00e6nger produktets levetid.<\/p>\n\n\n\n

Typer af keramiske printkort<\/h2>\n\n\n\n

Der er tre hovedprocesfamilier. Hver passer til forskellige pr\u00e6stations- og omkostningsm\u00e5l.<\/p>\n\n\n\n

\"Types<\/figure>\n\n\n\n

Co-fyret keramik med h\u00f8j temperatur (HTCC)<\/h3>\n\n\n\n

HTCC bruger aluminiumoxid-substrat med ildfaste metalpastaer - wolfram eller molybd\u00e6n. Vi serigraferer kredsl\u00f8bsm\u00f8nsteret p\u00e5 gr\u00f8n keramisk tape, stabler lag og br\u00e6nder derefter det hele ved 1600-1700 \u00b0C i en atmosf\u00e6re af reducerende gas (brint). Den h\u00f8je temperatur sintrer keramikken og metallet sammen til en monolitisk plade. HTCC fungerer godt til sm\u00e5 substrater med mange lag. Men den ekstreme br\u00e6nding for\u00e5rsager 15-20%-krympning; vi kompenserer for denne skalering under CAM-design. De ildfaste metaller har h\u00f8jere resistivitet end kobber, s\u00e5 HTCC-spor viser mere tab. Brug HTCC, n\u00e5r du har brug for mange lag (op til 10) og kan acceptere st\u00f8rre linjebredder. Vores fabrik kan holde 100 \u00b5m linje\/rum efter korrektion for krympning.<\/p>\n\n\n\n

Co-fyret keramik med lav temperatur (LTCC)<\/h3>\n\n\n\n

LTCC br\u00e6nder ved omkring 900 \u00b0C. Denne lavere temperatur giver os mulighed for at bruge \u00e6delmetalpasta - guld, s\u00f8lv eller guld-palladium. Substratet starter som et glaskeramisk kompositb\u00e5nd. Vi printer ledere, stanser hulrum med en laser eller mekanisk stans, fylder dem med pasta og laminerer lagene. Sambr\u00e6ndingen i en oxiderende ovn binder det hele sammen. LTCC giver bedre dimensionel kontrol end HTCC (kun 0,1-0,2% krympning), s\u00e5 vi opn\u00e5r finere linjer: Typisk 75 \u00b5m spor\/rum. Fordi det br\u00e6ndte metal er guld, kr\u00e6ver loddetinnet s\u00e6rlige bel\u00e6gninger. Vi tilf\u00f8jer ofte ENIG (elektrol\u00f8s nikkel neds\u00e6nket i guld)<\/a>\u00a0som en sidste finish. LTCC udm\u00e6rker sig til RF- og mixed-signal-applikationer, fordi den dielektriske konstant er ensartet og har lavt tab.<\/p>\n\n\n\n

Keramisk printkort med tyk film<\/h3>\n\n\n\n

Tykfilmsteknologi starter med et forbr\u00e6ndt keramisk substrat (normalt 96% aluminiumoxid). Vi screentrykker ledende, resistive og dielektriske pastaer lag for lag. Hvert lag br\u00e6ndes ved 850-1000 \u00b0C. Ledende pastaer er guld eller s\u00f8lv-palladium; dielektriske pastaer isolerer mellem lagene. Efter br\u00e6ndingen kan vi lasertrimme modstande med en tolerance p\u00e5 \u00b11%. Tykfilm er den billigste keramiske proces til prototyper og moderate m\u00e6ngder. Flerlags tykfilmskobber er en moderne variant: Vi printer kobberpasta og br\u00e6nder i kv\u00e6lstofatmosf\u00e6re. Det l\u00f8ser problemer med omkostninger til guldpasta og lodbarhed. Tykfilmskort kan h\u00e5ndtere 10-15 \u00b5m f\u00e6rdig kobbertykkelse, hvilket er nok til de fleste str\u00f8mkredse p\u00e5 op til 10 A.<\/p>\n\n\n\n

Sammenligning af keramiske PCB-materialer<\/h2>\n\n\n\n

At v\u00e6lge den rigtige keramik p\u00e5virker direkte den termiske ydeevne og prisen.<\/p>\n\n\n\n

Materiale<\/th>Termisk ledningsevne (W\/m-K)<\/th>CTE (ppm\/\u00b0C)<\/th>Dielektrisk konstant<\/th>Maks. driftstemperatur (\u00b0C)<\/th>Typisk brugssag<\/th><\/tr><\/thead>
Aluminiumoxid 96%<\/td>20-24<\/td>6.5-7.0<\/td>9.4<\/td>350<\/td>LED-moduler, str\u00f8mhybrider<\/td><\/tr>
Aluminiumoxid 99.6%<\/td>28-30<\/td>7.0<\/td>9.8<\/td>350<\/td>RF-substrater, chipb\u00e6rere<\/td><\/tr>
Aluminiumnitrid (AlN)<\/td>170-230<\/td>4.5<\/td>8.8<\/td>400<\/td>GaN-forst\u00e6rkere med h\u00f8j effekt, EV-invertere<\/td><\/tr>
Berylliumoxid (BeO)<\/td>260<\/td>6.4<\/td>6.7<\/td>450<\/td>Milit\u00e6re radarer (giftig-speciel h\u00e5ndtering)<\/td><\/tr>
Siliciumcarbid (SiC)<\/td>120-270<\/td>4.0<\/td>40<\/td>800+<\/td>Sensorer til ekstremt h\u00f8je temperaturer<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Alumina 96% giver den bedste balance mellem pris og ydelse. AlN koster ca. 3\u00d7 mere, men s\u00e6nker forbindelsestemperaturen med over 20 \u00b0C i et 50 W-design. Det ekstra termiske spillerum kan fordoble systemets gennemsnitlige tid mellem fejl. Vores fabrik har b\u00e5de 96%- og 99,6%-aluminiumoxid-emner p\u00e5 lager i 4\u2033\u00d74\u2033- og 6\u2033\u00d78\u2033-paneler. AlN-emner er tilg\u00e6ngelige p\u00e5 foresp\u00f8rgsel med lidt l\u00e6ngere leveringstider.<\/p>\n\n\n\n

De vigtigste fordele ved keramiske printkort<\/h2>\n\n\n\n

Enest\u00e5ende termisk ledningsevne<\/h3>\n\n\n\n

FR-4 leder varme med ca. 0,25 W\/m-K. Selv standard aluminiumoxid (24 W\/m-K) flytter varmen 96 gange hurtigere. Aluminiumnitrid klarer 170-230 W\/m-K. Det betyder, at et kobberplan p\u00e5 1 gram p\u00e5 keramik fungerer som en effektiv varmespreder. For eksempel vil et 2 mm bredt og 0,3 mm tykt kobberspor ved 100 A kun stige 5 \u00b0C over omgivelserne p\u00e5 en aluminiumoxidplade. Det samme spor p\u00e5 FR-4 ville blive overophedet og delaminere. Direkte komponentmontering p\u00e5 keramik eliminerer lag af termisk gr\u00e6nseflademateriale, hvilket reducerer den samlede modstand mellem forbindelsen og omgivelserne.<\/p>\n\n\n\n

Modstandsdygtighed over for h\u00f8je temperaturer<\/h3>\n\n\n\n

Vores HTCC- og tykfilmsaluminiumoxidplader arbejder kontinuerligt ved 350 \u00b0C. SiC-plader kan klare mere end 800 \u00b0C. Traditionel FR-4 har en glasovergangstemperatur (Tg) p\u00e5 130-170 \u00b0C; det bliver bl\u00f8dt og svigter langt under 200 \u00b0C. Denne h\u00f8je temperaturtolerance g\u00f8r keramiske printkort uundv\u00e6rlige til borev\u00e6rkt\u00f8jer i borehuller, missilstyring og sensorer under motorhjelmen p\u00e5 biler.<\/p>\n\n\n\n

Silikone- og keramikpakker med lav CTE-matchning<\/h3>\n\n\n\n

Siliciumchips udvider sig med ca. 2,6 ppm\/\u00b0C. Blyfri keramiske chipb\u00e6rere (LCCC) har en CTE p\u00e5 6-7 ppm\/\u00b0C. FR-4 udvider sig med 14-17 ppm\/\u00b0C. Denne uoverensstemmelse for\u00e5rsager tr\u00e6thed i loddefugen under termisk cykling. Et keramisk printkort med 6,5 ppm\/\u00b0C CTE passer n\u00e6sten perfekt til pakken. I vores p\u00e5lidelighedstest overlever keramik-til-LCCC-loddeforbindelser 2.000 termiske chokcyklusser (-55 \u00b0C til +125 \u00b0C) uden revnev\u00e6kst, mens de samme forbindelser p\u00e5 FR-4 svigter efter 500 cyklusser.<\/p>\n\n\n\n

Overlegen elektrisk isolering og h\u00f8jfrekvent ydeevne<\/h3>\n\n\n\n

Dielektrisk styrke overstiger 20 kV\/mm p\u00e5 aluminiumoxid. Den dielektriske konstant forbliver stabil p\u00e5 tv\u00e6rs af temperatur og frekvens med lav tabstangent. Dette giver mulighed for h\u00f8jimpedante kontrolspor til RF op til 20 GHz. For LTCC-kort med blandede signaler kan den parasit\u00e6re kapacitans falde med n\u00e6sten 90% sammenlignet med FR-4-designs. Denne reduktion reducerer krydstale og forbedrer n\u00f8jagtigheden af analog-til-digital konvertering.<\/p>\n\n\n\n

Mekanisk styrke og langtidsstabilitet<\/h3>\n\n\n\n

P\u00e5 trods af at de er sk\u00f8re, har keramiske substrater h\u00f8j trykstyrke (aluminiumoxid ~2.000 MPa). De modst\u00e5r kemisk erosion fra br\u00e6ndstoffer, syrer og reng\u00f8ringsmidler. Fugtabsorptionen er n\u00e6r nul, s\u00e5 de elektriske egenskaber \u00e6ndrer sig ikke. Vores plader opfylder IPC-TM-650 <\/a>fugtbestandighedstest uden nogen forringelse.<\/p>\n\n\n\n

Integration og miniaturisering med h\u00f8j densitet<\/h3>\n\n\n\n

Vi bruger laserborede mikro\u00e5bninger ned til 0,06 mm i diameter. Sammen med fine-line LTCC-processer (75 \u00b5m line\/space) kan du pakke flere komponenter p\u00e5 et mindre omr\u00e5de. Multilayer co-firing giver os mulighed for at indlejre passive komponenter - modstande, kondensatorer - inde i substratet under sintring. Det frig\u00f8r overfladeareal til aktive chips og stik. Et enkelt LTCC-kort kan erstatte en hel FR-4-samling med flere kort, hvilket reducerer v\u00e6gt og volumen.<\/p>\n\n\n\n

\"High\u2011Density<\/figure>\n\n\n\n

Hvorfor bruge keramiske printkort frem for andre?<\/h2>\n\n\n\n

Termisk ledningsevne: De rigtige tal<\/h3>\n\n\n\n

FR-4: 0,25 W\/m-K. MCPCB (aluminiumbagside): 1-2 W\/m-K, men bruger stadig et dielektrisk isoleringslag, hvilket skaber en flaskehals. Aluminiumoxidkeramik: 24 W\/m-K, uden isoleringslag. S\u00e5 varmen str\u00f8mmer \u00f8jeblikkeligt fra komponentpuden til den keramiske krop. En 10 W LED p\u00e5 en MCPCB kan n\u00e5 en overgangstemperatur p\u00e5 120 \u00b0C; den samme LED p\u00e5 aluminiumoxid holder sig under 100 \u00b0C. Denne k\u00f8ligere drift fordobler levetiden for lumen.<\/p>\n\n\n\n

Prissammenligning og samlede ejeromkostninger<\/h3>\n\n\n\n

Keramiske plader koster mere pr. arealenhed. En 2-lags 96% aluminiumoxidplade (100 \u00d7 80 mm) koster ca. $0,8-1,2\/cm\u00b2 i volumen (mere end 100 stk.). En tilsvarende FR-4-plade med fire lag koster $0,10\/cm\u00b2. Men systemomkostningerne fort\u00e6ller en anden historie. Keramik eliminerer behovet for termiske puder, varmespredere og store k\u00f8lelegemer. For en 50 W str\u00f8mforsyning overstiger besparelserne p\u00e5 k\u00f8lehardware og monteringsarbejde ofte $10 pr. enhed. Den keramiske version reducerer ogs\u00e5 returnering i marken. I l\u00f8bet af produktets levetid giver keramik lavere samlede ejeromkostninger.<\/p>\n\n\n\n

Teknologisk praksis: N\u00e5r keramik vinder<\/h3>\n\n\n\n

Brug keramik, n\u00e5r:<\/p>\n\n\n\n

    \n
  • Forbindelsestemperaturen skal v\u00e6re under 150 \u00b0C ved h\u00f8je omgivelsestemperaturer.<\/li>\n\n\n\n
  • Designet har mange CTE-f\u00f8lsomme komponenter (bare die, keramisk emballerede IC'er).<\/li>\n\n\n\n
  • Du har brug for RF-ydelse over 5 GHz.<\/li>\n\n\n\n
  • Produktet uds\u00e6ttes for kraftige vibrationer eller \u00e6tsende milj\u00f8er.<\/li>\n\n\n\n
  • Miniaturisering kr\u00e6ver blinde\/nedgravede vias og indlejrede passiver.<\/li>\n<\/ul>\n\n\n\n

    Hvis dine begr\u00e6nsninger kun er moderat varme, og prisen er det prim\u00e6re, kan MCPCB eller FR-4 af tykt kobber v\u00e6re tilstr\u00e6kkeligt. Men n\u00e5r du rammer en termisk mur, l\u00f8ser keramik problemet.<\/p>\n\n\n\n

    Hvordan fremstiller man et keramisk printkort?<\/h2>\n\n\n\n

    Vi bruger fire hovedproduktionsstr\u00f8mme p\u00e5 vores fabrik. Jeg vil gennemg\u00e5 dem enkelt.<\/p>\n\n\n\n

    HTCC-proces<\/h3>\n\n\n\n
      \n
    1. Afst\u00f8bning af b\u00e5nd:<\/strong>\u00a0Vi blander aluminiumoxidpulver med organisk bindemiddel og st\u00f8ber det til tynde, gr\u00f8nne plader.<\/li>\n\n\n\n
    2. Blanking og via punching:<\/strong>\u00a0Vi sk\u00e6rer pladerne til i panelst\u00f8rrelse og stanser eller laserborer vias.<\/li>\n\n\n\n
    3. Via p\u00e5fyldning og udskrivning:<\/strong>\u00a0Fyld vias med wolframpasta. Serigrafisk tryk af lederspor p\u00e5 hvert lag.<\/li>\n\n\n\n
    4. Laminering:<\/strong>\u00a0Stabl lagene i en presse under varme og tryk.<\/li>\n\n\n\n
    5. Medfyring:<\/strong>\u00a0Opvarm den laminerede stak til 1600-1700 \u00b0C i 32-48 timer i en brint- og kv\u00e6lstofkontrolleret atmosf\u00e6re. Bindemidlet br\u00e6nder ud, og keramikken sintrer med metal.<\/li>\n\n\n\n
    6. Efterbehandling:<\/strong>\u00a0Lasertrim eventuelle indlejrede modstande. Tilf\u00f8j overfladefinish (ENIG, dyps\u00f8lv), hvis det er n\u00f8dvendigt.<\/li>\n<\/ol>\n\n\n\n

      LTCC-proces<\/h3>\n\n\n\n

      Samme trin, men med glaskeramisk tape, guldpasta og br\u00e6nding ved 900 \u00b0C i luft. Der er ikke brug for brint. Via-st\u00f8rrelser g\u00e5r ned til 0,1 mm. Vi kan integrere induktorer og kondensatorer inde i stakken.<\/p>\n\n\n\n

      Tykfilmsproces<\/h3>\n\n\n\n
        \n
      1. Start med et f\u00e6rdigbr\u00e6ndt aluminiumoxid-substrat.<\/li>\n\n\n\n
      2. Screenprint lederlag (guld eller s\u00f8lv-palladium), t\u00f8r og br\u00e6nd ved 850-1000 \u00b0C.<\/li>\n\n\n\n
      3. Print dielektrisk lag for at isolere, og br\u00e6nd derefter.<\/li>\n\n\n\n
      4. Gentag for hvert lag. For tykfilmskobber, print og br\u00e6nd i nitrogen.<\/li>\n\n\n\n
      5. P\u00e5f\u00f8r endelig overglasur eller loddemaske (hvis n\u00f8dvendigt).<\/li>\n\n\n\n
      6. Lasertrim-modstande til v\u00e6rdi.<\/li>\n<\/ol>\n\n\n\n

        Typiske specifikationer for tykfilm: linje\/rum 125 \u00b5m, via-diameter 0,3 mm, op til 4 lederlag, f\u00e6rdig kobbertykkelse 10-15 \u00b5m pr. lag.<\/p>\n\n\n\n

        Direkte belagt kobber (DPC) og direkte bundet kobber (DCB)<\/h3>\n\n\n\n

        Det er enklere metoder til enkelt- eller dobbeltsidede plader. DPC sputter-deponerer et kobber seed-lag p\u00e5 keramik og elektroplader derefter til den \u00f8nskede tykkelse. DCB binder en tyk kobberfolie (0,1-0,3 mm) direkte p\u00e5 aluminiumoxid eller AlN ved h\u00f8j temperatur i nitrogen. Vi bruger DPC til LED-pakker og DCB til IGBT-moduler med h\u00f8j str\u00f8mstyrke. Begge leverer fremragende termisk ydeevne med kobbertykkelser p\u00e5 op til 300 \u00b5m.<\/p>\n\n\n\n

        Vores fabrik har standard panelst\u00f8rrelser: 4\u2033\u00d74\u2033, 5\u2033\u00d75\u2033, 6\u2033\u00d78\u2033 og 8\u2033\u00d710\u2033. Antallet af lag varierer fra 1 til 6 for tyk film og op til 10 for HTCC\/LTCC. Vi opn\u00e5r 75 \u00b5m linje\/rum p\u00e5 LTCC, 100 \u00b5m p\u00e5 HTCC. Overfladefinishen omfatter ENIG, ENEPIG, neds\u00e6nket s\u00f8lv og bl\u00f8dt guld, der kan bindes med guldtr\u00e5d.<\/p>\n\n\n\n

        Retningslinjer for design af keramiske printkort og DFM-checkliste<\/h2>\n\n\n\n

        At designe med keramik kr\u00e6ver s\u00e6rlig omhu for at undg\u00e5 revner og udbyttetab. Jeg vil give dig de bedste regler fra vores fabriks 15-\u00e5rige erfaring.<\/p>\n\n\n\n

        \"Ceramic<\/figure>\n\n\n\n

        Via-til-kant-afstand<\/h3>\n\n\n\n

        Den mest almindelige fejl, vi ser, er en revnet via n\u00e6r printkanten. Keramik er sk\u00f8rt. N\u00e5r vi afpudser plader med en diamantsav eller laser, kan mikrorevner forplante sig indad. Hold alle via-centre mindst 2,0 mm fra den endelige printkant. Hvis designet tvinger en t\u00e6ttere via, skal du bruge tear-drop pads til at forst\u00e6rke. En dr\u00e5bel\u00e6ngde p\u00e5 0,5\u00d7 paddiameteren giver en betydelig modstandsdygtighed over for revner.<\/p>\n\n\n\n

        Via Pad- og hul-design<\/h3>\n\n\n\n

        Brug tear-drops p\u00e5 hver via og SMD-pad. Det fordeler den mekaniske belastning. Den ringformede ring skal v\u00e6re mindst 0,15 mm for at opn\u00e5 klasse 3-p\u00e5lidelighed. Undg\u00e5 at placere vias under BGA-hj\u00f8rner, hvor stress koncentreres under termisk cykling.<\/p>\n\n\n\n

        Loddeprofil<\/h3>\n\n\n\n

        Keramik har h\u00f8j termisk masse og ledningsevne. Forvarmning bliver kritisk. Vores samlev\u00e6rksted bruger en rampe p\u00e5 2,5 \u00b0C\/sekund, en gennembl\u00f8dning ved 150-170 \u00b0C i 90 sekunder og en maksimal reflowtemperatur p\u00e5 245 \u00b0C for SAC305-loddetin. Kortet skal kun v\u00e6re over 217 \u00b0C i 45-60 sekunder for at undg\u00e5 overophedning af f\u00f8lsomme komponenter. Til THT skal du bruge en loddekolbe med kontrolleret varme og forvarme printet lokalt. Anvend aldrig direkte flamme.<\/p>\n\n\n\n

        Placering og h\u00e5ndtering af komponenter<\/h3>\n\n\n\n

        Placer tunge komponenter (transformatorer, h\u00f8jeffektmodstande) v\u00e6k fra kanter og hj\u00f8rner. Brug underfyldning til store BGA-pakker for at h\u00e5ndtere eventuelle CTE-forskelle mellem den keramiske plade og chippens organiske substrat. Brug ESD-sikre pincetter med bl\u00f8de spidser under manuel h\u00e5ndtering. Keramiske kanter er skarpe; brug handsker. Vores operat\u00f8rer bruger vakuumchucks til at flytte store paneler.<\/p>\n\n\n\n

        Impedansstyring og RF-spor<\/h3>\n\n\n\n

        Keramiks dielektriske konstant (9,4-9,8) adskiller sig fra FR-4 (4,5). Genberegn altid sporets dimensioner ved hj\u00e6lp af en ordentlig feltl\u00f8ser, ikke en generisk FR-4-beregner. For en 50-\u03a9 mikrostrip p\u00e5 0,635 mm tyk 96% aluminiumoxid er sporbredden ca. 0,6 mm. Vi leverer stack-up-data og test med kontrolleret impedans for differentielle par op til 20 GHz.<\/p>\n\n\n\n

        PTH og Via Fill<\/h3>\n\n\n\n

        Vi fylder vias med ledende pasta under co-firing. I tykfilm fyldes vias med dielektrikum eller efterlades \u00e5bne. Angiv via-in-pad-design, hvis du har brug for fyldte og overbelagte vias. Vi kan planere overfladen med en slibeproces til BGA med fin pitch.<\/p>\n\n\n\n

        Anvendelser af keramiske printkort<\/h2>\n\n\n\n

        Hukommelsesmoduler og h\u00f8jhastighedsdigital<\/h3>\n\n\n\n

        DDR-hukommelsesmoduler med h\u00f8j hastighed nyder godt af keramikkens lave dielektriske tab og termiske stabilitet. Vores kunder bruger LTCC-plader til at route 64-bit busser med minimeret sk\u00e6vhed. Den ensartede dielektriske konstant reducerer inter-symbol interferens.<\/p>\n\n\n\n

        Modtage-\/transmissionsmoduler (RF)<\/h3>\n\n\n\n

        Transceivere til satellitkommunikation kr\u00e6ver substrater med lavt tab. Aluminiumoxid- og AlN-plader med 0,06 mm laserviaer muligg\u00f8r kompakte fasede antenner. Til en 50 W satelliteffektforst\u00e6rker holdt et AlN-board spidstemperaturen under 150 \u00b0C. Designet fungerede p\u00e5lideligt i vakuum uden konvektionsk\u00f8ling.<\/p>\n\n\n\n

        Sammenkoblingskort i flere lag<\/h3>\n\n\n\n

        Ved hj\u00e6lp af HTCC\/LTCC integrerer vi op til 30 indlejrede passive komponenter i et 6-lags kort. Dette krymper en FR-4-stak med 4 kort til et keramisk modul. En kunde i luftfartssektoren reducerede v\u00e6gten med 70% og \u00f8gede forbindelsest\u00e6theden med 5\u00d7.<\/p>\n\n\n\n

        Analoge\/digitale PCB'er med blandet signal<\/h3>\n\n\n\n

        Parasit\u00e6r kapacitans skader ADC-ydelsen. Med LTCC reducerede vi den parasit\u00e6re kapacitans mellem analoge og digitale sektioner med ca. 90% sammenlignet med det samme kredsl\u00f8b p\u00e5 FR-4. Kortets st\u00f8jgulv faldt med 12 dB.<\/p>\n\n\n\n

        Luft- og rumfart og flyelektronik<\/h3>\n\n\n\n

        Missilkontrolsystemer arbejder ved 300 \u00b0C i omgivelserne. Vores HTCC-kort overlever tusindvis af st\u00f8d- og vibrationscyklusser. Ingen konform bel\u00e6gning er n\u00f8dvendig, fordi keramik er inert.<\/p>\n\n\n\n

        Effektelektronik til biler og elbiler<\/h3>\n\n\n\n

        En ladestation til elbiler bruger et AlN DCB-kort til at h\u00e5ndtere 200 A kontinuerligt. Temperaturstigningen forbliver under 20 \u00b0C. Kortet best\u00e5r IATF 16949-kvalifikationen.<\/p>\n\n\n\n

        Kraftig LED-belysning<\/h3>\n\n\n\n

        En 10 W LED p\u00e5 vores tykfilms-aluminiumoxidplade viser en overgangstemperatur p\u00e5 105 \u00b0C, hvilket er langt under gr\u00e6nsen p\u00e5 120 \u00b0C. Den samme LED p\u00e5 MCPCB n\u00e5r op p\u00e5 130 \u00b0C. Denne direkte binding forbedrer lumenoutput og levetid.<\/p>\n\n\n\n

        Indk\u00f8b af keramiske printkort: Omkostninger, leveringstid og MOQ<\/h2>\n\n\n\n

        Realistiske tal hj\u00e6lper dig med at planl\u00e6gge dit projektbudget og din tidsplan.<\/p>\n\n\n\n

        Fordeling af keramiske PCB-omkostninger<\/h3>\n\n\n\n
          \n
        • 2-lags 96% aluminiumoxid, tykfilms s\u00f8lvleder, 100\u00d780 mm, ENIG-finish: $8-12\/pc ved 100 stk.<\/li>\n\n\n\n
        • 2-lags 96% aluminiumoxid, tykfilmskobber: $10-15\/stk.<\/li>\n\n\n\n
        • 4-lags LTCC-guldleder, samme st\u00f8rrelse: $25-40\/pc (p\u00e5 grund af flere procestrin).<\/li>\n\n\n\n
        • 1-lags AlN DPC-plade til LED: $1-2 pr. cm\u00b2. Disse priser er ekskl. v\u00e6rkt\u00f8jsudgifter. V\u00e6rkt\u00f8j (sk\u00e6rmv\u00e6rkt\u00f8jer, fotomasker) koster typisk $500-1.000, som vi afskriver over volumen.<\/li>\n<\/ul>\n\n\n\n

          Mindste ordrem\u00e6ngde (MOQ)<\/h3>\n\n\n\n

          Til standard tykfilmsprocessen accepterer vi ordrer helt ned til 10 stk. For LTCC og HTCC er MOQ 50 stk. p\u00e5 grund af den faste batchst\u00f8rrelse for sambr\u00e6nding. Prototypek\u00f8rsler er tilg\u00e6ngelige med kortere leveringstider.<\/p>\n\n\n\n

          Ledetider<\/h3>\n\n\n\n
            \n
          • Prototype med tyk film i 2 lag: 10-12 arbejdsdage (inklusive lasertrimning)<\/li>\n\n\n\n
          • LTCC 4-lags prototype: 18-20 arbejdsdage<\/li>\n\n\n\n
          • Produktionsordrer: 15-25 dage afh\u00e6ngigt af volumen<\/li>\n\n\n\n
          • Hurtig service: 5-7 dage muligt for tyk film ved brug af forh\u00e5ndslagrede blankst\u00f8rrelser.<\/li>\n<\/ul>\n\n\n\n

            Vi giver hurtige tilbud inden for 24 timer efter modtagelse af dine Gerber-filer og stack-up.<\/p>\n\n\n\n

            Kvalitets- og p\u00e5lidelighedsstandarder for keramiske printkort<\/h2>\n\n\n\n

            G\u00e5 ikke ud fra, at alle keramiske plader er \u201cmeget p\u00e5lidelige\u201d. Certificering er vigtig.<\/p>\n\n\n\n

            IPC-6012 klasse 3-certificering<\/h3>\n\n\n\n

            Vi bygger keramiske printkort til IPC-6012 klasse 3 til missionskritiske applikationer. Klasse 3 kr\u00e6ver 100%-inspektion af via-tv\u00e6rsnit efter termisk chok. Vores fabrik udf\u00f8rer 6\u00d7 termiske chok-tests fra -65 \u00b0C til +150 \u00b0C og foretager derefter mikrosektionering af vias. Vi tillader ingen revner eller adskillelse af indre lag. Den ringformede ring p\u00e5 eksterne puder skal v\u00e6re mindst 0,050 mm.<\/p>\n\n\n\n

            Yderligere tests, vi udf\u00f8rer<\/h3>\n\n\n\n
              \n
            • Loddefloat ved 288 \u00b0C i 10 sekunder: ingen delaminering, ingen blister.<\/li>\n\n\n\n
            • Tr\u00e6kstyrke >5 gf for wire-bond pads.<\/li>\n\n\n\n
            • Ionisk forurening <1,5 \u00b5g\/cm\u00b2 NaCl-\u00e6kvivalent.<\/li>\n\n\n\n
            • Dielektrisk modstandssp\u00e6nding 500 V DC for tyk film, 1.500 V for co-fired.<\/li>\n<\/ul>\n\n\n\n

              Vores fabrik har ISO 9001- og IATF 16949-certificeringer. Vi overholder RoHS- og REACH-direktiverne. Vi bruger r\u00f8ntgeninspektion p\u00e5 alle flerlags LTCC-kort for at verificere via alignment.<\/p>\n\n\n\n

              Udfordringer og overvejelser<\/h2>\n\n\n\n

              Keramik er ikke en drop-in-erstatning. Det kr\u00e6ver et gennemt\u00e6nkt design.<\/p>\n\n\n\n

                \n
              • Sk\u00f8rhed:<\/strong>\u00a0Keramik kan revne under mekanisk st\u00f8d. Undg\u00e5 udkraget montering. Brug beslag eller lim hele kortet fast p\u00e5 en metalholder.<\/li>\n\n\n\n
              • Begr\u00e6nset bestyrelsesst\u00f8rrelse:<\/strong>\u00a0Det maksimale panel i \u00e9t stykke er ca. 200\u00d7200 mm p\u00e5 grund af krumning under sambr\u00e6nding. St\u00f8rre enheder skal v\u00e6re modulopbyggede.<\/li>\n\n\n\n
              • Leveringstid for specialfremstillede materialer:<\/strong>\u00a0Berylliumoxid- og AlN-emner har nogle gange 4-6 ugers leveringstid fra substratproducenten. Planl\u00e6g i god tid.<\/li>\n\n\n\n
              • Loddeproces:<\/strong>\u00a0Uden forvarmning kan termisk chok kn\u00e6kke printet. Forvarm altid til inden for 100 \u00b0C af loddets smeltepunkt.<\/li>\n\n\n\n
              • Det koster:<\/strong>\u00a0Til forbrugerprodukter kan keramik v\u00e6re overspecificeret. Brug det kun, hvor den termiske eller RF-ydelsesm\u00e6ssige fordel betaler sig.<\/li>\n<\/ul>\n\n\n\n

                Ofte stillede sp\u00f8rgsm\u00e5l<\/h2>\n\n\n\n

                Kan du lodde p\u00e5 et keramisk printkort?<\/h3>\n\n\n\n

                Ja, loddetin kl\u00e6ber godt til overfladebehandlinger som ENIG, s\u00f8lv-palladium eller tykfilmskobber. Brug et kolofoniumbaseret flusmiddel og en kontrolleret forvarmning for at undg\u00e5 termisk chok. Til LTCC med guldpasta l\u00e6gger vi ENIG p\u00e5 puderne for at sikre, at loddet bliver ordentligt v\u00e5dt.<\/p>\n\n\n\n

                Hvad er den dielektriske konstant for keramiske printkort?<\/h3>\n\n\n\n

                Alumina 96% har en dielektrisk konstant p\u00e5 9,4-9,8, AlN ca. 8,8, BeO 6,7. Til RF-design giver denne h\u00f8jere v\u00e6rdi mulighed for smallere spor for en given impedans sammenlignet med FR-4.<\/p>\n\n\n\n

                Hvad er den maksimale temperatur for keramiske printkort?<\/h3>\n\n\n\n

                Aluminiumoxid- og AlN-plader kan fungere kontinuerligt ved 350 \u00b0C. SiC-kredsl\u00f8b overstiger 800 \u00b0C. Temperaturgr\u00e6nsen kommer normalt fra metalpastaen (guld smelter ikke, men s\u00f8lv kan migrere ved h\u00f8j temperatur under DC-forsp\u00e6nding) og eventuelle monterede komponenter.<\/p>\n\n\n\n

                Hvordan sk\u00e6rer man et keramisk printkort?<\/h3>\n\n\n\n

                Vi bruger laserskrabning eller diamantsavning. Manuelt kan du ridse og klippe lige linjer, men forvent ru kanter. Til prototyper skal du bestille plader med den endelige konturfr\u00e6sning udf\u00f8rt p\u00e5 fabrikken.<\/p>\n\n\n\n

                Hvor tykt er et keramisk printkort?<\/h3>\n\n\n\n

                Standard substrattykkelser er 0,25 mm, 0,38 mm, 0,5 mm, 0,635 mm, 1,0 mm. Tykkere substrater p\u00e5 op til 2,0 mm er mulige til h\u00f8jsp\u00e6ndingsisolering.<\/p>\n\n\n\n

                Hvad er prisen p\u00e5 et keramisk printkort i forhold til FR-4?<\/h3>\n\n\n\n

                En keramisk plade koster 5-30\u00d7 mere pr. arealenhed end FR-4, men omkostningerne p\u00e5 systemniveau kan v\u00e6re lavere, n\u00e5r man fjerner hardware til varmestyring og \u00f8ger p\u00e5lideligheden.<\/p>\n\n\n\n

                Kan keramiske printkort have mere end 2 lag?<\/h3>\n\n\n\n

                Ja. HTCC og LTCC underst\u00f8tter nemt 4 til 10 lag. Vi integrerer passive komponenter internt, hvilket \u00f8ger den funktionelle t\u00e6thed.<\/p>\n\n\n\n

                Vigtige pointer<\/h2>\n\n\n\n
                  \n
                • Keramiske PCB-substrater (aluminiumoxid, AlN osv.) leder varme 100 gange hurtigere end FR-4.<\/li>\n\n\n\n
                • Den lave CTE matcher silicium- og keramikpakker og forhindrer loddetr\u00e6thed.<\/li>\n\n\n\n
                • V\u00e6lg den rigtige fremstillingsproces: tyk film til prisen, LTCC til pr\u00e6cision\/RF, HTCC til ekstreme h\u00f8jtemperatur-multilag.<\/li>\n\n\n\n
                • Anvend DFM-regler: Hold vias 2 mm fra kanter, brug teardrops, forvarm lodning.<\/li>\n\n\n\n
                • Tag h\u00f8jde for de samlede omkostninger, ikke kun printprisen; keramik sparer penge p\u00e5 k\u00f8ling og fejl i marken.<\/li>\n\n\n\n
                • Samarbejd med en fabrik, der tilbyder IPC-6012 klasse 3-certificering og realistiske leveringstider.<\/li>\n<\/ul>\n\n\n\n

                  Vores team har over 15 \u00e5rs erfaring med fremstilling af keramiske printkort. Vi st\u00f8tter dig fra materialevalg til inspektion af f\u00f8rste artikel. Send dine designfiler eller krav til vores ingeni\u00f8rer for at f\u00e5 en gratis designgennemgang og et omkostningsoverslag. Vi leverer p\u00e5lidelige keramiske printplader, der fungerer i de h\u00e5rdeste milj\u00f8er.<\/p>","protected":false},"excerpt":{"rendered":"

                  What Is a Ceramic PCB? A ceramic PCB uses an inorganic ceramic substrate instead of traditional FR\u20114 fiberglass.\u00a0Common substrate materials […]<\/p>","protected":false},"author":1,"featured_media":4984,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[36,30],"tags":[118,345,27,37,29],"class_list":["post-4981","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pcb-design","category-pcb-manufacturers","tag-ceramic-pcb","tag-fr-4-pcb","tag-pcb-assembly","tag-pcb-design","tag-pcb-manufacturers"],"spectra_custom_meta":{"_edit_lock":["1779960816:1"],"rank_math_internal_links_processed":["1"],"rank_math_primary_category":["36"],"rank_math_seo_score":["90"],"rank_math_title":["Ceramic PCB: Complete Guide to Design & Manufacturing"],"rank_math_description":["Discover ceramic PCB manufacturing and DFM rules. 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