Yakadhindwa Circuit Board (PCB) chinhu chakakosha chemagetsi chinoshandiswa zvakanyanya mumhando dzakasiyana dzemagetsi uye zvine hukama zvigadzirwa. PCB dzimwe nguva inodaidzwa kuti PWB (Printed Wire Board). Yaimbove yakawanda muHong Kong neJapan zvisati zvaitika, asi iye zvino zvishoma (zvechokwadi, PCB nePWB zvakasiyana). Munyika dzekuMadokero nematunhu, inowanzonzi PCB. KuMabvazuva, ine mazita akasiyana nekuda kwenyika dzakasiyana uye matunhu. Semuenzaniso, inowanzonzi printed circuit board mu mainland China (yaimbonzi printed circuit board), uye inowanzonzi PCB kuTaiwan. Mabhodhi edunhu anonzi emagetsi (dunhu) substrates muJapan uye substrates muSouth Korea.
PCB itsigiro yezvikamu zvemagetsi uye mutakuri wekubatanidza kwemagetsi kwezvikamu zvemagetsi, kunyanya kutsigira nekubatanidza. Zvakachena kubva kunze, chikamu chekunze chebhodhi redunhu chinonyanya kuve nemavara matatu: goridhe, sirivha, uye chiedza chitsvuku. Inorongwa nemutengo: goridhe ndiyo inonyanya kudhura, sirivha ndeyechipiri, uye tsvuku tsvuku ndiyo yakachipa. Zvisinei, iyo wiring mukati mebhodhi redunhu inonyanya kuchena mhangura, iyo isina mhangura.
Zvinonzi pachine simbi dzinokosha dzakawanda paPCB. Zvinonzi, paavhareji, smart phone yega yega ine 0.05g goridhe, 0.26g sirivheri, uye 12.6g mhangura. Goridhe riri palaptop rakapetwa ka10 pane renharembozha!
Sechitsigiro chezvikamu zvemagetsi, maPCB anoda zvinhu zvinosungirirwa pamusoro, uye chikamu chemhangura yemhangura inodiwa kuti iburitswe kuitira soldering. Aya maturu emhangura ari pachena anonzi mapedhi. Mapedhi acho anowanzo kuita rectangular kana denderedzwa ane nzvimbo diki. Nokudaro, mushure mokunge solder mask yapendwa, mhangura chete pamapadhi inoratidzwa kumhepo.
Iyo mhangura inoshandiswa muPCB iri nyore oxidized. Kana iyo mhangura padhi yakasvibiswa, haizongove yakaoma kutengesa, asiwo resistivity ichawedzera zvikuru, iyo ichakanganisa zvakanyanya kushanda kwechigadzirwa chekupedzisira. Nokudaro, padhi yakaputirwa negoridhe inert yesimbi, kana kuti pamusoro yakafukidzwa nechidimbu chesirivha kuburikidza nemakemikari, kana firimu yemakemikari yakakosha inoshandiswa kuvhara mhangura yemhangura kudzivirira padhi kuti isasangana nemhepo. Dzivirira oxidation uye chengetedza padhi, kuitira kuti igone kuve nechokwadi chegoho mune inotevera soldering process.
1. PCB yemhangura yakapfeka laminate
Copper clad laminate iplate-shaped material yakagadzirwa nekupfekedza girazi fiber jira kana zvimwe zvinosimbisa zvinhu zvine resin kune rimwe divi kana mativi ese ane foil yemhangura uye inopisa kudzvanya.
Tora girazi fiber jira-based copper clad laminate semuenzaniso. Zvishandiso zvayo zvikuru zvemhangura foil, girazi fiber jira, uye epoxy resin, iyo inoverengera inosvika 32%, 29% uye 26% yemutengo wechigadzirwa, zvichiteerana.
Circuit board factory
Copper clad laminate ndiyo yakakosha zvinhu zveakadhindwa edunhu mabhodhi, uye akadhindwa edunhu mabhodhi ndiwo anonyanya kukosha ezvigadzirwa zvemagetsi akawanda kuti awane kuwirirana kwedunhu. Nekuenderera mberi kwekuvandudza tekinoroji, mamwe akakosha emagetsi copper clad laminates anogona kushandiswa mumakore achangopfuura. Gadzira zvakananga zvikamu zvemagetsi zvakadhindwa. Makondukita anoshandiswa mumabhodhi edunhu akadhindwa anowanzo kugadzirwa nefoiri yakaonda-yakafanana nemhangura yakanatswa, kureva, foil yemhangura mupfungwa nhete.
2. PCB Immersion Gold Circuit Board
Kana goridhe nemhangura zvakabatana zvakananga, pachave nekuita kwemuviri kwekutama kweerekitironi uye kupararira (hukama pakati pemusiyano ungangoita), saka dhizaini re "nickel" rinofanira kugezwa sechivharo, uye ipapo goridhe rinoiswa pamagetsi. pamusoro pe nickel, saka isu tinowanzo kudana iyo Electroplated goridhe, zita rayo chairo rinofanira kunzi "electroplated nickel gold".
Musiyano uripo pakati pegoridhe rakaomarara negoridhe rakapfava kuumbwa kwechikamu chekupedzisira chegoridhe chinonamirwa pariri. Kana goridhe rakaputirwa, unogona kusarudza electroplate yakachena goridhe kana alloy. Nekuda kwekuti kuoma kwegoridhe rakachena kwakapfava, inonziwo "goridhe nyoro" . Nekuti "goridhe" rinogona kugadzira alloy yakanaka ne "aluminium", COB inonyanya kuda ukobvu hweiyi goridhe rakachena pakugadzira waya dzealuminium. Mukuwedzera, kana ukasarudza electroplated gold-nickel alloy kana gold-cobalt alloy, nokuti alloy ichava yakaoma kudarika goridhe rakachena, inonziwo "goridhe rakaoma".
Circuit board factory
Iyo goridhe-yakanamirwa layer inoshandiswa zvakanyanya muchikamu mapedhi, zvigunwe zvegoridhe, uye shrapnel yekubatanidza yedare redunhu. Mabhodhi eamai eanonyanya kushandiswa mbozha nhare edunhu mabhodhi kazhinji ane goridhe-akaputirwa mabhodhi, akanyudzwa goridhe mabhodhi, makomputa mamabhodhi, odhiyo uye madiki edhijitari edunhu mabhodhi kazhinji haasi mabhodhi akaputirwa negoridhe.
Ndarama igoridhe chairo. Kunyange kana chidimbu chakatetepa chete chakaputirwa, chinototora chikamu che10% chemutengo webhodhi redunhu. Kushandiswa kwegoridhe sechigadziko chekuisa ndeimwe yekufambisa simbi uye imwe yekudzivirira ngura. Kunyange chigunwe chegoridhe chememory stick icho chave chichishandiswa kwemakore anoverengeka chichiri kupenya sekare. Kana ukashandisa mhangura, aluminium, kana simbi, inokurumidza kuita ngura kuita murwi wezvimedu. Mukuwedzera, mari yegoridhe-yakaputirwa ndiro inenge yakakwirira, uye simba rekushongedza rakashata. Nekuti iyo electroless nickel plating process inoshandiswa, dambudziko dema disks rinogona kuitika. Iyo nickel layer ichaita oxidize nekufamba kwenguva, uye kuvimbika kwenguva refu idambudziko zvakare.
3. PCB Kunyudzwa Silver Circuit Board
Kunyudza Sirivha yakachipa pane Kunyudza Goridhe. Kana iyo PCB ine yekubatanidza inoshanda zvinodiwa uye inoda kudzikisa mutengo, Kunyudza Sirivha isarudzo yakanaka; yakasanganiswa neImmersion Silver's yakanaka flatness uye kubata, ipapo iyo Immersion Silver process inofanirwa kusarudzwa.
Immersion Silver ine akawanda maapplication muzvigadzirwa zvekutaurirana, mota, uye makomputa peripherals, uye zvakare ine maapplication mudhizaini yekumhanyisa chiratidzo. Sezvo Immersion Silver iine yakanaka magetsi zvimiro izvo mamwe marapirwo epamusoro haakwanise kuenderana, inogona zvakare kushandiswa mune yakakwirira-frequency masaini. EMS inokurudzira kushandisa kunyudza sirivheri maitiro nekuti iri nyore kuunganidza uye ine zvirinani kutarisa. Nekudaro, nekuda kwekuremara kwakadai sekusvibisa uye solder joint voids, kukura kwekunyudza sirivheri kwave kunonoka (asi kwete kuderera).
kuwedzera
Iyo yakadhindwa yedunhu bhodhi inoshandiswa seyekubatanidza mutakuri wezvakasanganiswa zvemagetsi zvikamu, uye kunaka kwebhodhi redunhu kuchakanganisa zvakananga kushanda kweakangwara zvigadzirwa zvemagetsi. Pakati pavo, iyo plating yemhando yeakadhindwa edunhu mabhodhi inonyanya kukosha. Electroplating inogona kuvandudza kudzivirira, solderability, conductivity uye kupfeka kuramba kwebhodhi redunhu. Mukugadzira maitiro eakadhindwa edunhu mabhodhi, electroplating inhanho yakakosha. Unhu hwe electroplating hunoenderana nekubudirira kana kukundikana kwemaitiro ose uye kushanda kwebhodhi redunhu.
Iyo huru electroplating maitiro e pcb ndeyemhangura plating, tin plating, nickel plating, goridhe plating uye zvichingodaro. Copper electroplating ndiyo yakakosha plating yemagetsi ekubatanidza ematunhu mabhodhi; tin electroplating ndiyo inodiwa mamiriro ekugadzirwa kwepamusoro-chaiyo maseketi seya anti-corrosion layer mukugadzirisa maitiro; nickel electroplating ndeye electroplate chigumbuso che nickel pabhodhi redunhu kudzivirira mhangura negoridhe Mutual dialysis; electroplating goridhe inodzivirira passivation ye nickel pamusoro kuti isangane nekuita kwe soldering uye corrosion resistance yedare redunhu.