{"id":4714,"date":"2026-02-03T09:57:04","date_gmt":"2026-02-03T09:57:04","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4714"},"modified":"2026-02-03T09:57:07","modified_gmt":"2026-02-03T09:57:07","slug":"acid-copper-plating-in-pcb-manufacturing","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/fi\/acid-copper-plating-in-pcb-manufacturing\/","title":{"rendered":"Happo kuparointi PCB-valmistuksessa"},"content":{"rendered":"<p>Rikkihappokuparointi on eritt\u00e4in t\u00e4rke\u00e4 rooli PCB-elektropinnoituksessa. Happokuparoinnin laatu vaikuttaa suoraan PCB:n kuparikerroksen laatuun. Se vaikuttaa my\u00f6s siihen liittyviin mekaanisiin ominaisuuksiin. Se voi vaikuttaa my\u00f6hempiin k\u00e4sittelyvaiheisiin. Happokuparoinnin laadun valvonta on siis keskeinen vaihe piirilevyjen galvanoinnissa. Monien suurten tehtaiden on vaikea hallita t\u00e4t\u00e4 vaihetta hyvin. Perustuen monien vuosien ty\u00f6h\u00f6n pinnoituksessa ja teknisess\u00e4 palvelussa, annan alla lyhyen yhteenvedon. Toivon, ett\u00e4 t\u00e4m\u00e4 auttaa piirilevyjen pinnoittajia.<\/p>\n\n\n\n<p>Happokuparoinnissa yleisi\u00e4 ongelmia ovat p\u00e4\u00e4asiassa seuraavat:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Karkea pinnoitus.<\/li>\n\n\n\n<li>Kuparikyhmyj\u00e4 levyn pinnalla.<\/li>\n\n\n\n<li>Pinnoitekuopat.<\/li>\n\n\n\n<li>Levyn pinnan valkaisu tai ep\u00e4tasainen v\u00e4ri.<\/li>\n<\/ol>\n\n\n\n<p>Seuraavassa esit\u00e4n yhteenvedon ongelmista ja annan lyhyen analyysin, ratkaisuja ja ennaltaehk\u00e4isevi\u00e4 toimenpiteit\u00e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Karkea pinnoitus<\/h2>\n\n\n\n<p>Laudan kulmissa on usein karheaa pinnoitusta. Useimmiten t\u00e4m\u00e4 johtuu liian suuresta pinnoitusvirrasta. Voit alentaa virtaa. Tarkista puristimella, onko virtalukema ep\u00e4normaali.<\/p>\n\n\n\n<p>Jos koko lauta on karkea, n\u00e4in tapahtuu harvoin. N\u00e4in kerran yhden tapauksen asiakkaalla. My\u00f6hemmin selvisi, ett\u00e4 s\u00e4\u00e4 oli kylm\u00e4 talvella. Kirkastusaineen (kirkasteaineen) pitoisuus oli liian alhainen. Joskus my\u00f6s uudelleenk\u00e4siteltyj\u00e4 levyj\u00e4, jotka ovat menett\u00e4neet resistikerroksensa, ei ole puhdistettu hyvin. Se voi aiheuttaa samanlaisen tilanteen.<\/p>\n\n\n\n<p><strong>Kuinka tarkistaa ja korjata:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Laske virtaa ja tarkkaile tulosta.<\/li>\n\n\n\n<li>Tarkista kirkastimen pitoisuus.<\/li>\n\n\n\n<li>Varmista, ett\u00e4 uudelleen ty\u00f6stetyt levyt puhdistetaan hyvin ennen pinnoitusta.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Kuparikyhmyj\u00e4 levyn pinnalla<\/h2>\n\n\n\n<p>Monet tekij\u00e4t voivat aiheuttaa kuparikyhmyj\u00e4. Ne voivat olla per\u00e4isin s\u00e4hk\u00f6tt\u00f6m\u00e4st\u00e4 kuparointivaiheesta, koko kuvionsiirtoprosessista tai itse kuparointivaiheesta.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Syyt s\u00e4hk\u00f6sinkopuhdistuskuparin k\u00e4sittelyss\u00e4<\/h3>\n\n\n\n<p>S\u00e4hk\u00f6suojatun kupariprosessin aiheuttamat kuparikyhmyt voivat olla per\u00e4isin mist\u00e4 tahansa prosessin vaiheesta.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Em\u00e4ksinen rasvanpoisto kovassa vedess\u00e4 tai kun porausp\u00f6ly\u00e4 on paljon (erityisesti kaksipuolisilla levyill\u00e4, jotka eiv\u00e4t saa hartsia poistettua kunnolla) ja kun suodatus on huono. T\u00e4m\u00e4 voi aiheuttaa levyn pinnan karheutta ja my\u00f6s reikien sis\u00e4ist\u00e4 karheutta. Yleens\u00e4 t\u00e4m\u00e4 aiheuttaa karheita reiki\u00e4. Kevyet laikkumaiset ep\u00e4puhtaudet levyn pinnalla voidaan poistaa mikroetsaamalla.<\/li>\n\n\n\n<li>Mikroetsausongelmat: mikroetsauksessa k\u00e4ytetty vetyperoksidi tai rikkihappo voi olla huonolaatuista. Tai ammoniumpersulfaatissa (tai natriumpersulfaatissa) voi olla liikaa ep\u00e4puhtauksia. Suosittelen k\u00e4ytt\u00e4m\u00e4\u00e4n ainakin CP-luokan kemikaaleja. Teollisuusluokan kemikaalit aiheuttavat usein muita vikoja.<\/li>\n\n\n\n<li>Mikroetsauskylvyn korkea kuparipitoisuus tai alhainen ymp\u00e4rist\u00f6n l\u00e4mp\u00f6tila voi saada kuparisulfaattikiteet muodostumaan hitaasti kylvyss\u00e4. My\u00f6s samea tai saastunut kylpyneste aiheuttaa ongelmia.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Roughness-inside-holes.webp\" alt=\"Roughness inside holes\" class=\"wp-image-4718\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Roughness-inside-holes.webp 500w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Roughness-inside-holes-300x300.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Roughness-inside-holes-150x150.webp 150w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Roughness-inside-holes-12x12.webp 12w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Aktivointiratkaisun ongelmat<\/h3>\n\n\n\n<p>Aktivointikylpyjen ongelmat johtuvat usein saastumisesta tai huonosta kunnossapidosta. Esimerkiksi suodatinpumppu imee ilmaa, kylvyn ominaispaino on alhainen tai kuparipitoisuus on korkea. Jos aktivointiallasta k\u00e4ytet\u00e4\u00e4n liian pitk\u00e4\u00e4n (esimerkiksi yli kolme vuotta), voi muodostua hiukkasia tai kolloideja. N\u00e4m\u00e4 hiukkaset voivat tarttua levyn pintaan tai reikien sein\u00e4miin. T\u00e4m\u00e4 n\u00e4kyy usein karkeissa rei'iss\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Nauha- tai kiihdytyskylvyt<\/h3>\n\n\n\n<p>Jos kylpy\u00e4 k\u00e4ytet\u00e4\u00e4n liian kauan ja se samentuu, se aiheuttaa ongelmia. Monissa nykyaikaisissa kuorinta-aineissa k\u00e4ytet\u00e4\u00e4n fluoroboorihappoa. N\u00e4m\u00e4 voivat hy\u00f6k\u00e4t\u00e4 lasikuidun kimppuun. <a href=\"https:\/\/flj-pcb.com\/fi\/fr-4-pcb-guide-properties-limits-material-choices\/\" data-type=\"post\" data-id=\"4641\">FR-4<\/a>. T\u00e4m\u00e4 nostaa silikaatti- ja kalsiumpitoisuuksia kylvyss\u00e4. Kuparipitoisuuden ja liuenneen tinan nousu voi my\u00f6s aiheuttaa laudan pinnan kuparikyhmyj\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Itse s\u00e4hk\u00f6t\u00f6n kuparis\u00e4ili\u00f6<\/h3>\n\n\n\n<p>S\u00e4ili\u00f6ss\u00e4 voi olla liian voimakasta toimintaa. Ilman sekoittaminen voi tuoda p\u00f6ly\u00e4. Kylvyss\u00e4 voi olla paljon suspendoituneita kiinteit\u00e4 hiukkasia. Voit s\u00e4\u00e4t\u00e4\u00e4 prosessiparametreja, lis\u00e4t\u00e4 tai vaihtaa ilmansuodatinpatruunoita tai suodattaa koko s\u00e4ili\u00f6n ongelman ratkaisemiseksi.<\/p>\n\n\n\n<p>\u00c4l\u00e4 s\u00e4ilyt\u00e4 levyj\u00e4 liian kauan laimeassa happokylvyss\u00e4, kun kupari on poistettu s\u00e4hk\u00f6tt\u00f6m\u00e4sti. Pid\u00e4 s\u00e4ili\u00f6 puhtaana. Jos kylpyamme on samea, vaihda se ajoissa. Jos j\u00e4t\u00e4t s\u00e4hk\u00f6t\u00f6nt\u00e4 kuparia sis\u00e4lt\u00e4v\u00e4n levyn liian pitk\u00e4ksi aikaa, se hapettuu. Jopa happoliuoksessa se voi hapettua. Oksidikerrosta on vaikea poistaa, ja se voi johtaa pinnan kuparikyhmyihin.<\/p>\n\n\n\n<p>Pintahapettumista lukuun ottamatta s\u00e4hk\u00f6tt\u00f6m\u00e4st\u00e4 kuparista per\u00e4isin olevat kuparikappaleet jakautuvat usein tasaisesti levylle. Kuvio on s\u00e4\u00e4nn\u00f6llinen. Niit\u00e4 aiheuttava likaantuminen, olipa se johtavaa tai ei, voi aiheuttaa kuparikyhmyj\u00e4 lopulliseen pinnoitettuun levyyn. K\u00e4yt\u00e4 vianetsinn\u00e4ss\u00e4 pieni\u00e4 testilevyj\u00e4 ja k\u00e4sittele niit\u00e4 vaiheittain syyn l\u00f6yt\u00e4miseksi. Tuotantoalustalla, jossa on t\u00e4m\u00e4 vika, voit kokeilla kevytt\u00e4 harjausta pehme\u00e4ll\u00e4 harjalla kyhmyjen poistamiseksi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kuvion siirtovaihe<\/h3>\n\n\n\n<p>My\u00f6s kuvionsiirto-ongelmat voivat aiheuttaa kyhmyj\u00e4. Jos kehitysty\u00f6n j\u00e4lkeen on j\u00e4\u00e4nyt vastusta (hyvin ohut vastuskalvo voidaan viel\u00e4 pinnoittaa ja peitt\u00e4\u00e4) tai jos puhdistus kehitysty\u00f6n j\u00e4lkeen on huono tai jos levyt ovat liian kauan kuvionsiirron j\u00e4lkeen, levyn pinta voi hapettua eriasteisesti. T\u00e4m\u00e4 on pahempaa, jos siirt\u00e4misen j\u00e4lkeinen puhdistus on huono tai jos varastointialueella on runsaasti ilmansaasteita. Ratkaisu on parantaa vesihuuhtelua, j\u00e4rjest\u00e4\u00e4 tuotantoaikataulu siten, ett\u00e4 levyt eiv\u00e4t odota liian kauan, ja tehostaa hapolla tapahtuvaa rasvanpoistoa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Happo kuparikylpy itse ja syyt kyhmyihin<\/h3>\n\n\n\n<p>Tavallisesti happokuparis\u00e4ili\u00f6n esik\u00e4sittely ei aiheuta kyhmyj\u00e4, koska ei-johtavat hiukkaset aiheuttavat useimmiten pinnoitusvirheit\u00e4 tai kuoppia. Kuparis\u00e4ili\u00f6n ongelmat, jotka aiheuttavat kyhmyj\u00e4, jakautuvat kuitenkin useisiin luokkiin: kylpyparametrien yll\u00e4pito, tuotantotoiminta, materiaalit ja huolto.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Kylpyammeen parametrien yll\u00e4pito:<\/strong> rikkihappopitoisuus liian korkea, kuparipitoisuus liian alhainen, kylpyl\u00e4mp\u00f6tila liian alhainen tai liian korkea. Erityisesti tehtaissa, joissa ei ole asianmukaista l\u00e4mp\u00f6tilan s\u00e4\u00e4t\u00f6\u00e4 ja j\u00e4\u00e4hdytyst\u00e4, virran tiheysalue voi laskea. Normaalik\u00e4yt\u00f6ss\u00e4 t\u00e4m\u00e4 voi aiheuttaa kuparijauheen muodostumisen kylpyyn.<\/li>\n\n\n\n<li><strong>Tuotantotoiminta:<\/strong> Liian suuri virta, huonot jigit tai kiinnittimet, avoimet kiinnityspisteet, s\u00e4ili\u00f6\u00f6n putoavat levyt, jotka koskettavat anodeja ja liukenevat, voivat kaikki aiheuttaa paikallisen suuren virran. T\u00e4m\u00e4 saa kuparijauheen muodostumaan ja putoamaan kylpyyn ja luomaan kyhmyj\u00e4.<\/li>\n\n\n\n<li><strong>Materiaalit:<\/strong> fosforikuparianodien ongelmat ja fosforin ep\u00e4tasainen jakautuminen voivat aiheuttaa ongelmia.<\/li>\n\n\n\n<li><strong>Prosessin yll\u00e4pito:<\/strong> kun k\u00e4sitell\u00e4\u00e4n suuria huoltot\u00f6it\u00e4, s\u00e4ili\u00f6\u00f6n voi pudota kuparilastuja tai roskia. Monet tehtaat eiv\u00e4t puhdista anodeja ja anodipusseja hyvin. T\u00e4m\u00e4 aiheuttaa piilevi\u00e4 riskej\u00e4. Suuria k\u00e4sittelyj\u00e4 varten puhdista anodin pinta hyvin ja mikroskooppaa vetyperoksidilla, jotta n\u00e4kyviin tulee tuoretta kuparia. Liota anodipussit ensin rikkihapossa + vetyperoksidissa, sitten em\u00e4ksisess\u00e4 liuoksessa ja pese hyvin. K\u00e4yt\u00e4 PP-suodatinpusseja, joissa on 5-10 mikronin v\u00e4lit.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Plating Pits (pistem\u00e4iset pinnoitusvirheet)<\/h2>\n\n\n\n<p>Monet vaiheet voivat aiheuttaa kuoppia. N\u00e4ihin vaiheisiin kuuluvat mm. s\u00e4hk\u00f6t\u00f6n kuparointi, kuvionsiirto, esipinnoitusk\u00e4sittely, kuparointi ja tinapinnoitus.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Point-like-Missed-Plating.webp\" alt=\"Point-like Missed Plating\" class=\"wp-image-4717\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Point-like-Missed-Plating.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Point-like-Missed-Plating-300x169.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Point-like-Missed-Plating-768x432.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/Point-like-Missed-Plating-18x10.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>S\u00e4hk\u00f6suojattu kupari aiheuttaa:<\/strong> jos s\u00e4hk\u00f6tt\u00f6mi\u00e4 kuparikoreja tai telineit\u00e4 ei puhdisteta hyvin pitk\u00e4\u00e4n aikaan, palladiumilla tai kuparilla saastuneita mikroetsauskylpyj\u00e4 voi tippua koreista levyn pinnalle. N\u00e4in syntyy kontaminaatiopisteit\u00e4. Kuparipinnoituksen j\u00e4lkeen n\u00e4ist\u00e4 kohdista tulee paikallisia pinnoitusvirheit\u00e4 tai kuoppia.<\/li>\n\n\n\n<li><strong>Kuvionsiirron syyt:<\/strong> monet kone- ja puhdistusongelmat voivat aiheuttaa kuoppia. Esimerkkej\u00e4 ovat: harjakoneen telat tai vedenpoimintatangot, jotka ovat hartsin saastuttamia, kuivaimet tai ilmaveitset, joiden sis\u00e4ll\u00e4 on \u00f6ljy\u00e4 tai p\u00f6ly\u00e4, huono p\u00f6lynpoisto ennen laminointia tai ennen silkkipainoa, huono kehitys kehitt\u00e4j\u00e4ss\u00e4, huono vesipesu kehittelyn j\u00e4lkeen, silikonia sis\u00e4lt\u00e4v\u00e4 vaahdonpoistoaine, joka saastuttaa kartongin.<\/li>\n\n\n\n<li><strong>Esiplatinointik\u00e4sittely:<\/strong> olipa kyseess\u00e4 sitten hapon rasvanpoisto, mikrosy\u00f6vytys tai esisukellus, p\u00e4\u00e4aineena on rikkihappo. Jos veden kovuus on suuri, kylpy muuttuu sameaksi ja voi saastuttaa levyn pinnan. My\u00f6s telineen eristyksen huono pinnoite voi liueta ja levit\u00e4 s\u00e4ili\u00f6\u00f6n ja saastuttaa kylpyammeen. Levyn pintaan tarttuvat johtamattomat mikrohiukkaset aiheuttavat eriasteisia pinnoitusvirheit\u00e4.<\/li>\n\n\n\n<li><strong>Hapan kuparis\u00e4ili\u00f6 aiheuttaa:<\/strong> ilmas\u00e4ili\u00f6t pois paikaltaan aiheuttavat ep\u00e4tasaista ilman sekoittumista. Suodatinpumput voivat vuotaa tai tulo voi olla l\u00e4hell\u00e4 spargereita, jolloin sis\u00e4\u00e4n tulee pieni\u00e4 ilmakuplia. N\u00e4m\u00e4 kuplat voivat tarttua levyn pintaan tai linjan reunoihin, erityisesti sivureunoihin tai linjan kulmiin. Huonolaatuisten puuvillakankaiden tai huonosti k\u00e4siteltyjen syd\u00e4nten k\u00e4ytt\u00f6 voi saastuttaa kylvyn. Valmistuksen aikana puuvillasyd\u00e4mille tehd\u00e4\u00e4n joskus antistaattisia k\u00e4sittelyj\u00e4, jotka saastuttavat kylvyn. N\u00e4iden ongelmien varalta ilmastusta on lis\u00e4tt\u00e4v\u00e4 ja pintavaahto on poistettava ajoissa. Liota puuvillasyd\u00e4mi\u00e4 happo- ja em\u00e4skylvyss\u00e4 niiden puhdistamiseksi ennen k\u00e4ytt\u00f6\u00e4.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Levyn valkaisu tai ep\u00e4tasainen v\u00e4ri<\/h2>\n\n\n\n<p>Levyn valkaisu tai ep\u00e4tasainen v\u00e4ri voi johtua ongelmista kuparikylvyn kirkasteainetasapainossa, voimakkaasta orgaanisesta saastumisesta tai liian korkeasta kylv\u00f6l\u00e4mp\u00f6tilasta. Hapan rasvanpoisto ei yleens\u00e4 aiheuta pesuongelmia. Mutta jos veden pH on hapan ja orgaaninen kuormitus on suuri, varsinkin jos k\u00e4ytet\u00e4\u00e4n kierr\u00e4tetty\u00e4 pesuvett\u00e4, pesu voi olla huono. T\u00e4m\u00e4 johtaa ep\u00e4tasaiseen mikroetsaukseen.<\/p>\n\n\n\n<p>Mikroetsauksen pitoisuus voi olla alhainen, kylvyn kuparipitoisuus voi olla korkea ja kylvyn l\u00e4mp\u00f6tila voi olla alhainen. N\u00e4m\u00e4 kaikki aiheuttavat ep\u00e4tasaista mikroetsausta. Huono huuhteluveden laatu, pitk\u00e4t huuhteluajat tai upotusta edelt\u00e4v\u00e4n hapon saastuminen voivat aiheuttaa pient\u00e4 hapettumista levyn pinnalla. Koska kuparis\u00e4ili\u00f6 on hapan ja levyt ovat j\u00e4nnitteisi\u00e4 s\u00e4ili\u00f6\u00f6n tullessaan, oksidia on vaikea poistaa. T\u00e4m\u00e4 aiheuttaa levyn ep\u00e4tasaisen v\u00e4rin. Jos levy koskettaa anodipussia, ep\u00e4tasainen anodin johtavuus tai anodin passivointi aiheuttavat my\u00f6s t\u00e4llaisia vikoja.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"337\" height=\"600\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/PCB-electroplating-production-line.webp\" alt=\"PCB electroplating production line\" class=\"wp-image-4716\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/PCB-electroplating-production-line.webp 337w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/PCB-electroplating-production-line-169x300.webp 169w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/02\/PCB-electroplating-production-line-7x12.webp 7w\" sizes=\"(max-width: 337px) 100vw, 337px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Lyhyet k\u00e4yt\u00e4nn\u00f6n toimenpiteet ja tarkistuslista<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Pid\u00e4 pinnoitusvirta oikealla alueella. Tarkista mittareilla.<\/li>\n\n\n\n<li>Pid\u00e4 kirkasteiden ja lis\u00e4aineiden pitoisuudet spesifikaatioiden rajoissa.<\/li>\n\n\n\n<li>Pid\u00e4 kylvyn l\u00e4mp\u00f6tila vakaana. K\u00e4yt\u00e4 tarvittaessa l\u00e4mp\u00f6tilan s\u00e4\u00e4t\u00f6\u00e4.<\/li>\n\n\n\n<li>S\u00e4\u00e4d\u00e4 veden laatua ja huuhteluaikaa. Huuhtele kokonaan jokaisen vaiheen j\u00e4lkeen.<\/li>\n\n\n\n<li>Huolehdi suodatuksesta ja ilmansuodattimista. Vaihda suodatinpatruunat tarvittaessa.<\/li>\n\n\n\n<li>Puhdista anodit ja anodipussit s\u00e4\u00e4nn\u00f6llisesti. K\u00e4yt\u00e4 asianmukaisia pesu- ja liotusvaiheita.<\/li>\n\n\n\n<li>K\u00e4yt\u00e4 asianmukaisia kemiallisia laatuja (mieluiten CP-luokkaa). V\u00e4lt\u00e4 heikkolaatuisia teollisuuskemikaaleja, kun puhtaudella on merkityst\u00e4.<\/li>\n\n\n\n<li>V\u00e4lt\u00e4 levyjen pitki\u00e4 s\u00e4ilytysaikoja s\u00e4hk\u00f6tt\u00f6m\u00e4n kuparoinnin j\u00e4lkeen. Pid\u00e4 s\u00e4ili\u00f6t puhtaina ja vaihda sameat kylvyt.<\/li>\n\n\n\n<li>Pid\u00e4 jigit ja telineet hyv\u00e4ss\u00e4 kunnossa. V\u00e4lt\u00e4 l\u00f6ysi\u00e4 kiinnittimi\u00e4 ja avoimia kosketuspisteit\u00e4.<\/li>\n\n\n\n<li>Est\u00e4\u00e4 p\u00f6lyn ja \u00f6ljyn p\u00e4\u00e4syn kylpyyn. Puhdista koneet ja ilmaveitset.<\/li>\n\n\n\n<li>K\u00e4yt\u00e4 testitauluja ja vaiheittaisia tarkastuksia vikojen l\u00e4hteen paikantamiseksi.<\/li>\n\n\n\n<li>Kun vika ilmenee, tee ensin paikallisia testej\u00e4, kuten pehme\u00e4 harjaus, ja s\u00e4\u00e4d\u00e4 sitten prosessia ja huoltoa.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"<p>Sulfuric acid copper plating plays a very important role in PCB electroplating. The quality of acid copper plating directly affects 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