Pcb bhodhi anoshandiswa zvakanyanya mumagetsi, makomputa, midziyo yemagetsi, michina michina uye mamwe maindasitiri. Iko kutsigirwa kwezvikamu uye inonyanya kushandiswa kubatanidza zvikamu zvekupa magetsi. Pakati pavo, 4-layer uye 6-layer circuit boards ndiyo inonyanya kushandiswa uye inoshandiswa zvakanyanya. , Akasiyana mazinga ePCB akaturikidzana anogona kusarudzwa zvinoenderana neindasitiri yekushandisa.

Corrosion maitiro ePCB redunhu bhodhi:

Iyo etching process yeakadhindwa redunhu bhodhi inowanzopedzwa mutangi rekuora. Iyo etching zvinhu inoshandiswa ndeye ferric chloride. Mhinduro (FeCL3 concentration 30% -40%) yakachipa, iyo corrosion reaction speed inononoka, maitiro ari nyore kudzora, uye anoshanda Corrosion yeimwe uye kaviri-sided copper clad laminates.

Iyo corrosive solution inowanzogadzirwa neferric chloride nemvura. Iyo ferric chloride yakasimba yero, uye iri nyore kutora unyoro mumhepo, saka inofanira kuvharwa nekuchengetwa. Paunenge uchigadzira ferric chloride solution, 40% ferric chloride uye 60% mvura inowanzoshandiswa, hongu, yakawanda ferric chloride, kana mvura inodziya (kwete mvura inopisa kudzivirira pendi kuti irege kudonha) inogona kuita kuti mhinduro yacho ikurumidze Cherechedza kuti ferric chloride. iri corrosive. Edza kusabata ganda rako uye zvipfeko. Shandisa bheseni repurasitiki rakachipa rekuita mudziyo, ingokwana bhodhi redunhu.

Tanga kukanganisa PCB redunhu bhodhi kubva kumucheto. Kana iyo foil yemhangura isina pendi yakasvibiswa, bhodhi redunhu rinofanira kutorwa kunze nenguva kudzivirira pende kubva pakubvisa maseketi anobatsira. Panguva ino, simbura nemvura yakachena, uye bvisa pende ne bamboo chips nenzira (panguva ino, pende inobuda mumvura uye iri nyore kubvisa). Kana zvisiri nyore kukwenya, ingogeza nemvura inopisa. Woipukuta woipukuta nesandpaper, uchiburitsa foil yemhangura inopenya, uye bhodhi redunhu rakadhindwa ragadzirira.

Mushure mokunge bhodhi redunhu rakadhindwa rakasvibiswa, mishonga inotevera inofanira kuitwa mushure mokunge bhodhi redunhu rakadhindwa rasvibiswa.

1. Mushure mokubvisa firimu, bhodhi redunhu rakadhindwa rakashambidzwa nemvura yakachena rinoputirwa mumvura inopisa kwenguva yakati, uye ipapo firimu yakaputirwa (yakaiswa) inogona kubviswa. Nzvimbo isina kupukutwa inogona kucheneswa neyakaonda kusvika yachena.

2. Bvisa iyo oxide film. Kana iyo yakavharwa (yakanamatirwa) firimu yakanyungudutswa, mushure mekunge bhodhi redunhu rakadhindwa raomeswa, pukuta bhodhi kakawanda nemucheka wakanyikwa muupfu hwe decontamination kuti udzise iyo oxide firimu pafoiri yemhangura, kuitira kuti iyo yakadhindwa yedunhu uye solder Iyo inopenya. ruvara rwemhangura runoratidzwa pa diski.

Zvinofanira kucherechedzwa kuti pakupukuta foil yemhangura nemucheka, inofanira kupukuta nenzira yakagadziriswa kuita kuti foil yemhangura iratidze nzira imwe chete, iyo inotarisa yakaisvonaka. Shenesa bhodhi rakakwenenzverwa redunhu nemvura woriomesa.

3. Kushandisa flux Kuti ubatsire kutengesa, iva nechokwadi chekufambisa kwebhodhi redunhu rakadhindwa uye kudzivirira kuparara, mushure mokunge bhodhi redunhu rakadhindwa rapera, chidimbu chekuyerera kunofanira kuiswa kune mhangura yemhangura yebhokisi redunhu rakadhindwa kudzivirira okisijeni.