{"id":4618,"date":"2026-01-16T06:29:31","date_gmt":"2026-01-16T06:29:31","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4618"},"modified":"2026-01-16T06:29:34","modified_gmt":"2026-01-16T06:29:34","slug":"fpc-flex-circuit-stiffening-and-reinforcement-processes","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/fi\/fpc-flex-circuit-stiffening-and-reinforcement-processes\/","title":{"rendered":"FPC-joustopiirin j\u00e4ykistys- ja vahvistusprosessit"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Johdanto<\/h2>\n\n\n\n<p>FPC-j\u00e4ykistyksell\u00e4 ei pelk\u00e4st\u00e4\u00e4n pidet\u00e4 osia. Se voi my\u00f6s auttaa l\u00e4mm\u00f6npoistossa. Mutta jos levy\u00e4 pit\u00e4\u00e4 muokata tai korjata, j\u00e4ykisteen poistaminen voi vahingoittaa johtoja. Pid\u00e4 t\u00e4m\u00e4 mieless\u00e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. Erityisk\u00e4sittelyt FPC:n j\u00e4ykist\u00e4mist\u00e4 varten<\/h2>\n\n\n\n<p>Erikoismallien avulla j\u00e4ykiste voi tehd\u00e4 muutakin kuin tukea osia. Vaikka p\u00e4\u00e4tavoitteena on esimerkiksi osien tukeminen, j\u00e4ykiste voidaan tehd\u00e4 tukevaksi komponentiksi, jolloin joustolevy k\u00e4ytt\u00e4ytyy kokoonpanon j\u00e4lkeen enemm\u00e4n kuin j\u00e4ykk\u00e4 levy.<\/p>\n\n\n\n<p>J\u00e4ykisteen \u00e4\u00e4riviivat (muotoleikkaus) tehd\u00e4\u00e4n yleens\u00e4 CNC-jyrsint\u00e4laitteilla. Leikkauksen aikana j\u00e4tet\u00e4\u00e4n joitakin liitoskohtia tai siltoja, jotta j\u00e4ykiste voidaan my\u00f6hemmin irrottaa tai katkaista. N\u00e4in j\u00e4ykiste voidaan helposti katkaista tai poistaa kokoonpanon j\u00e4lkeen.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"700\" height=\"466\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/cnc.webp\" alt=\"cnc\" class=\"wp-image-4619\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/cnc.webp 700w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/cnc-300x200.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/cnc-18x12.webp 18w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p>CNC-jyrsint\u00e4 on yleist\u00e4 joustovalmistuksessa. Laserleikkaus ja vesisuihkuleikkaus ovat my\u00f6s vaihtoehtoja. Niit\u00e4 voidaan k\u00e4ytt\u00e4\u00e4 j\u00e4ykisteen materiaalin valmisteluun tai esileikkaamiseen. Levyjen, joissa on korkeuseroja, leikkausmenetelm\u00e4t, kuten laser- tai vesisuihkuleikkaus, voivat yksinkertaistaa prosessia. Ne my\u00f6s v\u00e4hent\u00e4v\u00e4t kustannuksia, koska leimausv\u00e4lineit\u00e4 ei tarvita.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. J\u00e4ykisteiden mekaaninen ty\u00f6st\u00f6 (leimaaminen\/leikkaus)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 Leimaaminen \/ stanssaus<\/h3>\n\n\n\n<p>Jos j\u00e4ykisteen valmistuksessa k\u00e4ytet\u00e4\u00e4n verkkopuristusta tai stanssausta, tarvitaan erityisi\u00e4 puristusmuotteja. Kun leimaamalla on poistettu kovaa materiaalia osien ymp\u00e4rilt\u00e4, j\u00e4ljelle j\u00e4\u00e4v\u00e4 levy voidaan ty\u00f6nt\u00e4\u00e4 takaisin alkuper\u00e4iseen asentoonsa. T\u00e4m\u00e4 menetelm\u00e4 on yleinen edullisissa j\u00e4ykiss\u00e4 levyiss\u00e4 ja suurissa sarjoissa tapahtuvassa kokoonpanossa, jossa k\u00e4ytet\u00e4\u00e4n yksinkertaisia kiinnikkeit\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 Pisteytys tai osittainen leikkaaminen<\/h3>\n\n\n\n<p>Jos taipuisa \u00e4\u00e4riviiva sallii, voidaan k\u00e4ytt\u00e4\u00e4 pisteytys- tai osittaisleikkausty\u00f6kaluja. Pistoleikkaus leikkaa yleens\u00e4 jousto- tai j\u00e4ykisteen osittain l\u00e4pi. Erikoisty\u00f6kalut ohjaavat leikkaussyvyytt\u00e4. Kun osat on sijoitettu ja kokoonpano on valmis, levy voidaan katkaista pisteytysviivaa pitkin.<\/p>\n\n\n\n<p>Useimmat muut leikkaustekniikat joutuvat leikkaamaan koko materiaalin l\u00e4pi, kun taas useimmat muut leikkaustekniikat joutuvat leikkaamaan koko materiaalin l\u00e4pi, verrattuna jyrsittyyn \u00e4\u00e4riviivaty\u00f6skentelyyn. Mekaanisten leikkureiden luonteen vuoksi leikatut muodot ovat yleens\u00e4 suoria viivoja.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. J\u00e4ykisteiden kiinnitykseen k\u00e4ytett\u00e4v\u00e4t liimat<\/h2>\n\n\n\n<p>Liimat, joita k\u00e4ytet\u00e4\u00e4n j\u00e4ykisteiden liimaamiseen taipuisaan alustaan, valitaan niiden vaaditun k\u00e4ytt\u00f6tarkoituksen mukaan. Joustossa k\u00e4ytett\u00e4vien standardiliimojen lis\u00e4ksi on olemassa muitakin liimatyyppej\u00e4. Yleiset j\u00e4ykisteiden liimatyypit ja ominaisuudet:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Paineherkk\u00e4 liima (PSA)<\/h3>\n\n\n\n<p>PSA:ta k\u00e4ytet\u00e4\u00e4n laajalti j\u00e4ykisteiss\u00e4. Se on joustavaa ja helppok\u00e4ytt\u00f6ist\u00e4. Se antaa hyv\u00e4n liimauslujuuden ja voi joissakin tapauksissa parantaa kest\u00e4vyytt\u00e4. Useimpia PSA:ita ei ole suunniteltu pitk\u00e4aikaiseen korkean l\u00e4mp\u00f6tilan k\u00e4ytt\u00f6\u00f6n, ja ne kest\u00e4v\u00e4t yleens\u00e4 vain lyhyen korkean l\u00e4mp\u00f6tilan altistumisen. Lyijytt\u00f6mien juotosten (korkeammat reflow-l\u00e4mp\u00f6tilat) yhteydess\u00e4 on tarkistettava, toimiiko PSA vaaditussa prosessissa. PSA:n erityisen\u00e4 etuna on se, ett\u00e4 se antaa joustimen tarttua l\u00e4hes mihin tahansa pintaan, joten monet sis\u00e4\u00e4nrakennetut j\u00e4ykistysmallit ovat mahdollisia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 Kestomuoviset liimakalvot<\/h3>\n\n\n\n<p>L\u00e4mp\u00f6kovetteisilla liimakalvoilla, joita kutsutaan joskus akryylipinnoitetuiksi kalvoiksi tai liimauslevyiksi, voidaan liimata j\u00e4ykisteit\u00e4 ja joustoja. Ne vaativat ylim\u00e4\u00e4r\u00e4isi\u00e4 k\u00e4sittelyvaiheita ja aikaa. L\u00e4mp\u00f6kovettuvilla liimoilla voidaan kuitenkin saavuttaa eritt\u00e4in korkea sidoslujuus ja korkea l\u00e4mp\u00f6tilankest\u00e4vyys.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.3 Nestem\u00e4iset liimat<\/h3>\n\n\n\n<p>J\u00e4ykisteiden liimaamiseen k\u00e4ytet\u00e4\u00e4n yksi- tai kaksikomponenttisia epoksiliimoja. Niit\u00e4 on vaikea levitt\u00e4\u00e4 tasaisesti, joten ne ovat harvinaisempia kuin kalvoliimat. Nestem\u00e4iset liimat muodostavat liimausreunaan asteittaisen epoksihelman. T\u00e4m\u00e4 helmi auttaa lievitt\u00e4m\u00e4\u00e4n j\u00e4nnityst\u00e4 siirtym\u00e4reunassa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.4 Termoplastiset liimakalvot<\/h3>\n\n\n\n<p>Termoplastiset liimakalvot ovat toinen yleinen valinta. Niiss\u00e4 on alhainen j\u00e4nnitys ja ne ovat t\u00e4ysin polymeerisi\u00e4 ilman kemiallista kovettumista. Ne kiinnittyv\u00e4t moniin pintoihin, ja niit\u00e4 on raportoitu olevan helppo muokata. N\u00e4m\u00e4 ominaisuudet laajentavat niiden k\u00e4ytt\u00f6\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.5 UV-kovetteiset liimat<\/h3>\n\n\n\n<p>UV-kovetteiset liimat ovat toinen vaihtoehto. Jotkin koostumukset ovat silkkipainettavissa. Jotkin UV-aktivoituvat polymeerit voivat aktivoinnin j\u00e4lkeen osoittaa PSA:n kaltaista tarttuvuutta. Koska UV-liimat kovettuvat nopeasti, ne ovat hy\u00f6dyllisi\u00e4 malleissa, joissa tarvitaan nopeaa pehme\u00e4n ja kovan v\u00e4lisen siirtym\u00e4\u00e4 ja rasituksenpoistoa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. J\u00e4ykisteiden rei\u00e4t (v\u00e4lysrei\u00e4t, asennusrei\u00e4t, kiinnitysrei\u00e4t).<\/h2>\n\n\n\n<p>Rei\u00e4t, jotka on tarkoitettu osan tyhjent\u00e4miseen, ja rei\u00e4t, jotka on tarkoitettu lopulliseen kokoonpanoon, ovat erilaisia, ja niill\u00e4 on joskus vastakkaisia vaikutuksia. Suunnittelus\u00e4\u00e4nt\u00f6jen on vastattava k\u00e4ytt\u00f6tarkoitusta. Suunnittelutiedoissa on selitett\u00e4v\u00e4, miten reikien halkaisijat valitaan.<\/p>\n\n\n\n<p>Jos t\u00e4m\u00e4 j\u00e4tet\u00e4\u00e4n huomiotta suunnittelussa tai valmistuksessa, osan reikien ja kuparin v\u00e4lisiss\u00e4 liitoskohdissa saattaa esiinty\u00e4 aukkoja tai kuparikatkoksia. Saatat tarvita my\u00f6hempi\u00e4 korjauksia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 J\u00e4ykisteess\u00e4 olevat komponenttien v\u00e4lykset ja rei\u00e4t<\/h3>\n\n\n\n<p>Reikien, jotka tyhjent\u00e4v\u00e4t pinnoitetut l\u00e4pirei\u00e4t, tulisi olla 250 \u00b5m - 375 \u00b5m suurempia kuin pinnoitetut l\u00e4pirei\u00e4t. T\u00e4m\u00e4 kompensoi mahdollisen vinoutuman laminoinnin aikana ja auttaa varmistamaan, ett\u00e4 j\u00e4ykiste ei tuki p\u00e4\u00e4llystettyj\u00e4 reiki\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.2 Asennus \/ kiinnitysrei\u00e4t<\/h3>\n\n\n\n<p>Asennusta varten tehtyjen j\u00e4ykisteen reikien on oltava hieman pienempi\u00e4 kuin joustimen reikien. T\u00e4m\u00e4 auttaa est\u00e4m\u00e4\u00e4n kokoonpanon j\u00e4nnityksen siirtymisen joustoon. T\u00e4t\u00e4 ei aina vaadita. Joissakin malleissa joustin voidaan kiinnitt\u00e4\u00e4 suoraan kantajaan ilman j\u00e4ykistett\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.3 Tukemattomat kiinnitysrei\u00e4t<\/h3>\n\n\n\n<p>Jos kiinnitysrei\u00e4ss\u00e4 ei ole j\u00e4ykistystukea, pid\u00e4 kuparia rei\u00e4n ymp\u00e4rill\u00e4 (rengasmainen rengas) lujuuden lis\u00e4\u00e4miseksi. Jos rakenne sallii, samaa menetelm\u00e4\u00e4 voidaan k\u00e4ytt\u00e4\u00e4 tavallisiin asennusreikiin. T\u00e4m\u00e4 muoto helpottaa my\u00f6s maadoitusta.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. Yleiset FPC-j\u00e4ykistemateriaalit ja niiden ominaisuudet<\/h2>\n\n\n\n<p>FPC:ss\u00e4 k\u00e4ytet\u00e4\u00e4n yleisesti kolmea j\u00e4ykistysmateriaalia: PI, FR4 ja ruostumaton ter\u00e4s. Yksityiskohdat:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 PI (polyimidi)<\/h3>\n\n\n\n<p>PI on tekninen erikoismateriaali. Sit\u00e4 k\u00e4ytet\u00e4\u00e4n laajalti ilmailu- ja avaruusalalla, mikroelektroniikassa, nanotekniikassa, nestekiden\u00e4yt\u00f6iss\u00e4, erotuskalvoissa ja lasereissa. Se on liekinkest\u00e4v\u00e4 ja kest\u00e4\u00e4 korkeita ja matalia l\u00e4mp\u00f6tiloja. Pitk\u00e4aikaisk\u00e4yt\u00f6n l\u00e4mp\u00f6tila-alueet vaihtelevat laatuluokittain, mutta PI kest\u00e4\u00e4 laajan alueen. FPC:ss\u00e4 PI:t\u00e4 k\u00e4ytet\u00e4\u00e4n suojakalvona ja j\u00e4ykistyslevyin\u00e4. PI-suojakalvo erist\u00e4\u00e4 virtapiirej\u00e4. PI-j\u00e4ykistyslevyj\u00e4 k\u00e4ytet\u00e4\u00e4n kultasormien takaosassa ja muilla alueilla, joilla tarvitaan eristyst\u00e4 ja vahvistusta. PI-j\u00e4ykisteen paksuus valitaan suunnittelun ja ymp\u00e4rist\u00f6n mukaan. Toleranssi voidaan s\u00e4\u00e4t\u00e4\u00e4 \u00b10,03 mm:n tarkkuudella. PI kest\u00e4\u00e4 hyvin prosessil\u00e4mp\u00f6tiloja (yleisesti 130 \u00b0C-280 \u00b0C, laadusta riippuen). Yleiset PI-j\u00e4ykisteen paksuudet: 0,075 mm, 0,1 mm, 0,125 mm, 0,15 mm, 0,175 mm, 0,2 mm, 0,225 mm, 0,25 mm.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"511\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PI-Polyimide.webp\" alt=\"PI (Polyimide)\" class=\"wp-image-4622\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PI-Polyimide.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PI-Polyimide-300x192.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PI-Polyimide-768x491.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PI-Polyimide-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">5.2 FR4<\/h3>\n\n\n\n<p>FR4 on paloturvallinen materiaali. Paperipohjaisiin levyihin verrattuna sill\u00e4 on parempi mekaaninen lujuus, mittapysyvyys, iskunkest\u00e4vyys ja kosteudenkest\u00e4vyys. Sen s\u00e4hk\u00f6inen suorituskyky on hyv\u00e4 ja se toimii korkeammissa l\u00e4mp\u00f6tiloissa. K\u00e4sittelyss\u00e4 sill\u00e4 on usein etuja muihin hartsi-lasikuitulevyihin verrattuna. FPC-tuotannossa FR4-levy\u00e4 k\u00e4ytet\u00e4\u00e4n p\u00e4\u00e4asiassa j\u00e4ykisteen\u00e4 juotosalueiden takana. Se lis\u00e4\u00e4 kovuutta juotosalueella ja suojaa pintaliitososia toistuvan taivutuksen aiheuttamilta vioilta. Koska FR4 kuluu enemm\u00e4n kuin PI, sit\u00e4 ei yleens\u00e4 k\u00e4ytet\u00e4 kultasormien j\u00e4ykist\u00e4miseen. FR4-j\u00e4ykisteiden osalta: jos paksuus  1,0 mm, toleranssi on \u00b10,1 mm. Yleiset FR4-j\u00e4ykisteiden paksuudet: 0,1 mm, 0,2 mm, 0,3 mm, 0,4 mm, 0,5 mm, 0,6 mm, 0,7 mm, 1,6 mm.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"614\" height=\"469\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/FR4.webp\" alt=\"FR4\" class=\"wp-image-4621\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/FR4.webp 614w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/FR4-300x229.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/FR4-16x12.webp 16w\" sizes=\"(max-width: 614px) 100vw, 614px\" \/><\/figure>\n\n\n\n<p>Nopea vertailu: PI:ll\u00e4 on tiukemmat toleranssit ja hyv\u00e4 l\u00e4mm\u00f6nkest\u00e4vyys, mutta se ei ole kovin kova. FR4 on paksumpi ja j\u00e4ykempi, siin\u00e4 on suuremmat toleranssit ja se on vakaampi k\u00e4sin koottaessa, mutta sit\u00e4 on vaikeampi muokata.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5.3 Ter\u00e4sj\u00e4ykisteet (ruostumaton ter\u00e4s)<\/h3>\n\n\n\n<p>Yleens\u00e4 ruostumatonta ter\u00e4st\u00e4 303. 303 on austeniittinen ruostumaton ter\u00e4s, jossa on rikki\u00e4 ja seleeni\u00e4 ty\u00f6stett\u00e4vyyden ja pintak\u00e4sittelyn parantamiseksi. FPC-j\u00e4ykisteiss\u00e4 on usein monimutkaisia muotoja, ja ruostumaton 303 on helppo sy\u00f6vytt\u00e4\u00e4. FPC-tuotteissa, joissa tarvitaan suurta vakautta, 303-ter\u00e4ksest\u00e4 valmistetut j\u00e4ykisteet ovat yleisi\u00e4. Ter\u00e4sj\u00e4ykisteit\u00e4 ei voida porata CNC-ohjauksella eik\u00e4 leikata FPC-laserilla. Ne valmistetaan yleens\u00e4 kemiallisella sy\u00f6vytyksell\u00e4, joten kustannukset ovat korkeammat. Ne on koottava k\u00e4sin, prosessi on monimutkaisempi ja kustannukset ovat korkeammat. Yleiset ter\u00e4sj\u00e4ykisteiden paksuudet: 0,1 mm, 0,2 mm.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/Steel-Stiffeners.webp\" alt=\"Steel Stiffeners\" class=\"wp-image-4623\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/Steel-Stiffeners.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/Steel-Stiffeners-300x200.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/Steel-Stiffeners-768x512.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/Steel-Stiffeners-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">6. Suunnittelukohdat ja k\u00e4yt\u00e4nn\u00f6n neuvot<\/h2>\n\n\n\n<p>Kun suunnittelet j\u00e4ykisteit\u00e4 ja reiki\u00e4, tee selv\u00e4ksi kunkin rei\u00e4n k\u00e4ytt\u00f6tarkoitus (v\u00e4lys, kokoonpano, kiinnitys). Ilmoita rei\u00e4n halkaisija, toleranssi ja sijaintitoleranssi suunnittelumerkinn\u00f6iss\u00e4.<\/p>\n\n\n\n<p>J\u00e4ykisteiss\u00e4, jotka ovat l\u00e4hell\u00e4 pinnoitettuja reiki\u00e4, on j\u00e4tett\u00e4v\u00e4 riitt\u00e4v\u00e4sti v\u00e4lyst\u00e4 tai suurennettava reik\u00e4\u00e4 250-375 \u00b5m:ll\u00e4, jotta pinnoitetut rei\u00e4t eiv\u00e4t tukkeudu laminoinnin aikana.<\/p>\n\n\n\n<p>Jos j\u00e4ykiste kest\u00e4\u00e4 kokoonpanoa tai mekaanista rasitusta, kannattaa harkita kovempia materiaaleja, kuten FR4:\u00e4\u00e4 tai ter\u00e4st\u00e4. Mutta jos tuleva uudelleenk\u00e4sittely on todenn\u00e4k\u00f6ist\u00e4, suosi PI- tai kestomuovikalvoratkaisuja, joita on helpompi muokata.<\/p>\n\n\n\n<p>Kun valitset liimoja, ota huomioon uudelleenjuoksutusl\u00e4mp\u00f6tilat (erityisesti lyijyt\u00f6nt\u00e4 juottamista varten), j\u00e4lkity\u00f6st\u00f6tarpeet, pitk\u00e4n aikav\u00e4lin ymp\u00e4rist\u00f6 (l\u00e4mp\u00f6tila, kosteus) ja liimattavat pinnat.<\/p>\n\n\n\n<p>Monimutkaisten muotojen tai eritt\u00e4in tarkkojen j\u00e4ykisteiden valmistuksessa kannattaa suosia kemiallista sy\u00f6vytyst\u00e4 tai laserleikkausta ty\u00f6kalujen kustannusten alentamiseksi. Suuria m\u00e4\u00e4ri\u00e4 ja s\u00e4\u00e4nn\u00f6llisi\u00e4 muotoja varten kannattaa harkita leimausta tai stanssausta yksikk\u00f6kustannusten alentamiseksi.<\/p>\n\n\n\n<p>Jos joudut irrottamaan j\u00e4ykisteen kokoonpanon j\u00e4lkeen, j\u00e4t\u00e4 j\u00e4ykisteen ja joustimen v\u00e4liin siltoja tai pisteviivoja, jotta se voidaan katkaista tai poistaa my\u00f6hemmin.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">7. Yhteenveto (hyv\u00e4t ja huonot puolet)<\/h2>\n\n\n\n<p>PI-j\u00e4ykisteet: tiukka toleranssi, hyv\u00e4 korkean l\u00e4mp\u00f6tilan kest\u00e4vyys, helppo integroida joustoon, hyv\u00e4 j\u00e4lkity\u00f6stett\u00e4vyys; ei yht\u00e4 kova kuin FR4.<\/p>\n\n\n\n<p>FR4-j\u00e4ykisteet: paksummat, kovemmat, vakaammat juotosalueille; suurempi toleranssi, vaikeampi muokata.<\/p>\n\n\n\n<p>303-ter\u00e4ksest\u00e4 valmistetut j\u00e4ykisteet: eritt\u00e4in j\u00e4yk\u00e4t ja vakaat, mutta kalliimmat, sy\u00f6vytt\u00e4m\u00e4ll\u00e4 tehdyt, vaativat manuaalista kokoonpanoa ja j\u00e4lkity\u00f6t ovat vaikeita.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction FPC stiffening does more than hold parts. It can also help with heat dissipation. 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