PCB Plating Techniques: The Ultimate Guide for Success

MaPCB anoumbwa netiweki yakaoma yemaitiro ekufambisa uye mapedhi, anowanzo gadzirwa nemhangura, akarongwa pane insulating substrates. Kuchengetedza izvi zvakakosha zvikamu kubva mukuora, kuwedzera magetsi conductivity, uye kuona kuvimbika kwavo kwenguva refu, maitiro ePCB plating anoshandiswa. Ichi chinyorwa chinotarisa mukati mekuoma kwePCB plating, kuongorora kukosha kwayo, zvinhu zvinoshandiswa, maitiro ekuputira, nzira dzakajairwa, uye zvinhu zvinopesvedzera budiriro plating.

Kukosha kwePCB Plating

Kuisa maPCB paPCB kunoshanda sedanho rakakosha mukugadzirwa kwePCB , zvichipa mabhenefiti akawanda anokwezva:

1. Ngura Protection: Rimwe remabasa ekutanga ePCB plating ndeyekudzivirira maronda emhangura uye mapedhi kubva mukuora. Mhangura inotapukirwa neoxidation, iyo inogona kukanganisa kubatanidzwa kwemagetsi nekufamba kwenguva. Plating inoumba chipingamupinyi chinodzivirira chinoita kuti PCB irambe yakasimba uye yakavimbika.
2. Enhanced Electrical Conductivity: Kuputira kunobatsira mukuvandudza magetsi ePCB. Izvi zvakakosha pakufamba kwakanaka kwemasaini emagetsi mukati mebhodhi, kuderedza kurasikirwa kwechiratidzo uye kuona kuti mudziyo unoshanda zvakanaka.
3. Solderability: PCB plating inopa inogoneka nzvimbo yekutengesa zvinhu zvemagetsi pabhodhi. Kutengesa kwakaringana kwakakosha kumisikidza yakavimbika magetsi ekubatanidza, ibwe rekona rePCB mashandiro.
4. mukurumari: Kupfekedza kunoita kuti PCB irambe yakasimba, ichiichengetedza kubva mukukuvadzwa kwemuviri kunogona kuitika panguva yekugadzira, kugadzira, kana kushandiswa kwemazuva ese. Uku kusimba kunowedzera hupenyu hwePCB uye kunobvumira kushandiswa kwayo munzvimbo dzinoda.

Zvishandiso Zvinoshandiswa muPCB Plating

Sarudzo yezvigadzirwa zveplating zvinoenderana nezvinodiwa zvekushandisa. Zvinhu zvakajairika zvinoshandiswa paPCB plating zvinosanganisira:

• goridhe: Kuiswa kwegoridhe kwakawanda nekuda kweiyo yakasarudzika magetsi conductivity, corrosion resistance, uye kugara kwenguva refu. Hunhu hwayo hwakapfava zvakare hunoita kuti kuve nyore kugadzirisa panguva yekugadzira.
• sirivha: Sirivha, inozivikanwa nekukwira kwayo kwemagetsi conductivity, inofarirwa nepamusoro-frequency application. Nekudaro, inonyanya kujaira kune oxidation nekufamba kwenguva ichienzaniswa negoridhe.
• nickel: Nickel inowanzo shandiswa sechinhu chepasi pasi nekuda kwekunamira kwayo. Inopa hwaro hwakakodzera hweanotevera plating layer, segoridhe kana sirivheri.
• mhangura: Mhangura inoshandiswawo sechinhu chepasi pasi, ichipa yakanakira nzvimbo yekunamatira yekuwedzera plating layer. Iyo yakanaka conductor yemagetsi.

Iyo PCB Plating Maitiro

Iyo PCB plating process inosanganisira akati wandei matanho ane hungwaru:

1. kuchenesa: Danho rekutanga kuchenesa zvakakwana kwePCB kubvisa chero tsvina, tsvina, kana mafuta aripo pamusoro. Specialized chemical cleaning solutions inoshandiswa kune chinangwa ichi.
2. Etching: Mhangura isingadikanwi inobviswa kubva paPCB's surface kuburikidza nekemikari etching process. Iyi nzira inosarudza kubvisa mhangura yakawandisa, ichisiya kuseri kwemhangura inodiwa uye mapedhi.
3. Pre-Dip: Mushure mekucheka, iyo PCB inonyudzwa mune pre-dip mhinduro inogadzirira nzvimbo yeplating nekusimudzira kunamatira.
4. Kupera: Electroplating ndiyo moyo weplating process. Munguva iyi, chidimbu chitete chesimbi chinopfekwa pamusoro pemhangura. Iyo PCB inonyudzwa mumushonga we electrolytic, uye magetsi anoiswa, zvichiita kuti maion esimbi mumhinduro aise pamhangura yePCB, ichiita simbi inodzivirira.
5. Post-Dip: Kutevera plating, iyo PCB inopinda post-dip process kuti ive nechokwadi chekuti plating layer yakaumbwa zvizere uye inonamira zvakachengeteka pamusoro.
6. Kubvisa (kana zvichidiwa): Mune mamwe mamiriro ezvinhu, plating layer ingangoda kubviswa, kazhinji kana nyaya neplating dzikamuka. Izvi zvinowanikwa kuburikidza nekemikari yekubvisa mhinduro inosarudza kubvisa simbi yesimbi.

Yakajairwa PCB Plating Nzira dzeKugadzira

Kugadzirwa kwePCBs kunosanganisira nzira dzakasiyana dzekuisa dzinoenderana nezvinodiwa uye zvinodiwa. Pano, isu tinonyura zvakadzama mune idzi dzakajairwa PCB nzira dzekuisa:

Selective Plating

Kuisa mapurasitiki ekusarudza inzira yakanyatsonanga nzvimbo dzakatarwa dzePCB kuti dziise mapurasitiki asi dzimwe nzvimbo dzichisiya mamwe mapurasitiki asina kubatwa. Nzira iyi inonyanya kubatsira pakugadzira macircuit ane layer yakawanda kana kana paine dzimwe nzira dzinofambisa mhepo dzinodiwa munzvimbo dzakatarwa. Nekushandisa mapurasitiki munzvimbo dzakatarwa, vagadziri vane mukana wekuchinja-chinja uye kutonga pamusoro pemagadzirirwo nemashandiro ePCB.

Kuburikidza neHole Plating

Kuburikidza ne-hole plating inzira inoshandiswa zvakanyanya, kunyanya mukugadzirwa kwe-multilayer PCBs. Zvinosanganisira plating yesimbi kuburikidza nemakomba kana vias kuti kuyambuka akaturikidzana PCB. Aya akapfava-kuburikidza nemakomba anoshanda semakonditi, achibatanidza zvidimbu zvakasiyana mukati mebhodhi. Kuburikidza ne-gomba plating kwakakosha pakuona kuenderera kwemagetsi uye kufambisa kwemasaini pakati pezvikamu zvakasiyana zvePCB. Iyi nzira inowedzera kutendeseka kwemaitiro uye kugadzikana kubhodhi, zvichiita kuti ive yakakodzera kune zvakasiyana-siyana zvekushandisa.

Pamusoro peMount Technology (SMT) Plating

Surface mount tekinoroji (SMT) plating inotariswa pane epamusoro mapadhi ePCB. Aya mapedhi epamusoro akakosha pakubatanidza zvinhu zvemagetsi kubhodhi. Kuisa mapedhi epamusoro kunowedzera kusimba kwavo uye magetsi ekugadzirisa, kuve nechokwadi chekubatana kwakavimbika pakati pePCB uye zvikamu. SMT plating inonyanya kukosha mukugadzira zvemagetsi zvemazuva ano, uko miniaturization uye ine vanhu vakawanda PCBs zvakajairika. Iyo yakasimba yekumusoro kupedzisa yakapihwa neSMT plating yakakosha pakutengesa zvinhu nenzira kwayo, kunyangwe mune yakakwirira-density marongero.

Imwe neimwe yeidzi nzira dzePCB dzekuisa dzinoshanda kune chimwe chinangwa uye inobatsira kune yakazara kushanda uye kuvimbika kweiyo yakadhindwa redunhu bhodhi. Vagadziri vanonyatso sarudza yakafanira nzira yekuisa zvichienderana nedhizaini yezvinodiwa uye chinangwa chekushandiswa kwePCB.

Yakajairika Surface Inopedzisa muPCB Plating

Sarudzo yekupedzisa kwepamusoro chinhu chakakosha chePCB plating, sezvo ichikanganisa zvakananga kuita kwebhodhi uye kuvimbika. Heano akati wandei akajairwa pamusoro pekupedzisira anoshandiswa muPCB plating, imwe neimwe iine yakasarudzika zvivakwa uye zvakanakira:

Ndarama yakanamirwa pamifananidzo

Kuiswa kwegoridhe ndiyo yakanyanya kuwanda uye kufarirwa kwepamusoro pekupedzisira mukugadzira PCB. Kuzivikanwa kwayo kunobva kune yakasarudzika magetsi conductivity, kusimba kunoshamisa, uye kuramba kune oxidation. MaPCB akaputirwa negoridhe anovimbika zvakanyanya, achiita kuti ave akakodzera kushandiswa kwakasiyana-siyana, kusanganisira ayo ari mumamiriro ezvinhu akaomarara. Iyo yegoridhe yekumusoro kupedzisa inovimbisa yakagadzikana uye yakaderera-inodzivirira kubatanidza magetsi, zvichiita kuti ive sarudzo yepamusoro yemishini-yakakosha michina yemagetsi.

Electroless Nickel Immersion Gold (ENIG)

Electroless Nickel Immersion Goridhe (ENIG) inzira yekupedzisa pamusoro inosanganisira kuisa nhete yenickel pamusoro pePCB, ichiteverwa nedhiri regoridhe. Iyo nickel layer inoshandisa zvinangwa zvakawanda, zvinosanganisira kusimudzira kunamatira uye nekupa hwaro hwakavimbika hweiyo goridhe layer. ENIG inopa yakanakisa conductivity uye corrosion kuramba, zvichiita kuti ive sarudzo yakakurumbira kune maapplication uko zvese zvemagetsi kuita uye kuvimbika kwakakosha. Iyo inoenderana neindasitiri zviyero uye inonyanya kukodzera kune yakanaka-pitch zvikamu uye yakaoma PCB dhizaini.

Tin ra

Tin plating inzira ine hupfumi inogoneka pane kuisa goridhe. Kunyange isingaite segoridhe, tini inopa yakanaka conductivity yemagetsi uye kusimba. Iyo inowanzoshandiswa seyepamusoro pekupedzisira mune dzakasiyana siyana maapplication. Nekudaro, tini inotapukirwa neoxidation kana ichienzaniswa negoridhe kana ENIG, iyo inogona kunetsa mune dzimwe nharaunda. Kubata kwakakodzera uye kuchengetedza zvinodiwa kuchengetedza kushanda kwayo nekufamba kwenguva.

Silver Plating

Silver plating inosarudzwa nekuda kweiyo yakasarudzika magetsi conductivity, iyo inoita kuti ive yakakodzera kune yakakwira-frequency application. Pasinei nekuita kwayo kunoshamisa, sirivheri inowanzoita oxidation, uye kusimba kwayo nekufamba kwenguva kwakadzikira pane iyo yegoridhe kana ENIG. Silver-plated PCBs anowanzo shandiswa mumamiriro ezvinhu apo mabhenefiti eiyo yakakwirira conductivity inodarika ayo anogona hupenyu hurefu nyaya. Kudzikamisa kunetsa kweoxidation, vagadziri vanogona kuisa mamwe machira ekudzivirira kana kushandisa sirivheri mumashandisirwo ane hunyanzvi uko zvakanakira zvakakosha.

Kusarudza iyo yakakodzera yepamusoro pekupedzisira kwePCB zvinoenderana nezvinodiwa chaizvo zvekushandisa, mari inotariswa, uye chiyero chinodiwa pakati pekuita uye hupenyu hurefu. Kupera kwega kwega kwepamusoro kune masimba uye zvisingakwanisi, uye vagadziri vanonyatso ongorora zvinhu izvi kuti vaone kuti PCB yakapedzwa inosangana neyakagadzirirwa dhizaini uye maitiro ekushanda.

Zvinhu Zvinokurudzira Kubudirira PCB Plating

Iyo yakabudirira plating yePCB inopesvedzerwa nezvinhu zvakati wandei zvakakosha, chimwe nechimwe chine basa rakakosha pakuona mhando, kuvimbika, uye kuita kwePCB yapera. Heano zvinhu zvakakosha zvinopesvedzera zvakabudirira PCB plating:

Ukobvu hweKuisa :

Ukobvu hweiyo plating layer chinhu chakakosha chinokanganisa mashandiro ePCB. Ukobvu hunotaridza conductivity yemagetsi, kusimba, uye huwandu hwemhando yeplating. Iyo inodzorwa zvakanaka uye yakafanana plating ukobvu inovimbisa kuenderana kwemagetsi kubatana uye dziviriro kubva mukuora. Vagadziri vanofanirwa kuomerera kune chaiyo plating ukobvu yakatarwa kuti isangane nezvinodiwa zvekugadzira uye kushandisa.

Kunamira :

Iko kunamatira kweiyo plating layer kune PCB substrate kwakakosha pakuona yakavimbika uye inogara kwenguva refu kupera. Kunamatira kwakakodzera kunodzivirira delamination kana peeling yeplating nekufamba kwenguva, izvo zvinogona kutungamira kune nyaya dzemagetsi uye kuderedzwa kuvimbika. Zvinhu zvinopesvedzera kunamatira zvinosanganisira kugadzirira kwepamusoro, maitiro ekuchenesa, uye kusarudzwa kwezvinhu zvekuisa. Kunyatsonamira kwakakosha pakuita kwakasimba kwePCB.

Kufanana :

Kufanana kweiyo plating layer paPCB yese yepamusoro kwakakosha kuti magetsi ashande. Kusajairika plating ukobvu kana kusiyanisa kwemhando yeplating kunogona kukonzera kusaenzana kwemagetsi ekubatanidza uye kusaina kutendeseka nyaya. Vagadziri vanoshandisa inodzorwa yeplating maitiro kuti vawane kufanana uye kusangana nedhizaini yakatarwa. Kuve nechokwadi chekufanana kunonyanya kukosha mu-high-frequency kana high-speed applications.

Kugadzirira Pamusoro :

Kugadzirira kwakaringana kwepamusoro inhanho yakakosha muPCB plating process. Nzvimbo yePCB inofanira kunyatsocheneswa uye isina zvinosvibisa, oxidation, kana zvisaririra isati yaiswa. Kusakwana kwekugadzirira kwepamusoro kunogona kutungamirira kune kusanamatira kusina kunaka uye kukanganisa kweplating. Nzira dzakasiyana-siyana dzekuchenesa uye marapirwo emakemikari anoshandiswa kugadzirira iyo PCB yepamusoro kuti ibudirire plating.

Sarudzo yePlating Material :

Kusarudzwa kwezvinhu zveplating kune zvakakosha pakuita kwePCB uye kushanda kwayo. Zvinhu zvakasiyana-siyana, zvakadai segoridhe, sirivheri, tin, kana nickel, zvinopa zvinhu zvakasiyana uye zvakanakira. Sarudzo yemidziyo yekuisa inoenderana nezvinhu zvakaita semagetsi conductivity, kusimba, mutengo, uye mashandisiro-chaiwo zvinodiwa. Vagadziri vanotarisa izvi zvinhu kuti vaone iyo yakanyanya kukodzera plating zvinhu kune yakapihwa PCB.

Kudzora Maitiro Ekuisa Plating :

Kurongeka uye kutonga panguva yeplating process ndiyo yakakosha. Vagadziri vanoshandisa michina yepamberi uye otomatiki maitiro kuti vave nechokwadi chemhedzisiro yeplating. Kudzora ma paramita, anosanganisira tembiricha, density iripo, nguva yekuputira, uye yekugeza chemistry, inofanirwa kunyatsotariswa uye kugadziridzwa kuti isangane neinodiwa plating yakatarwa. Kutsauswa kwemaitiro kunogona kutungamirira kune kukanganisa kweplating uye nyaya dzekuita.

Zvaunofanira Kufunga Nezvekugadzira :

Dhizaini yePCB inoita basa guru mukubudirira kwepurasitiki. Zvinhu zvekugadzira zvakaita sekurongeka kwezvisaririra, mapedhi, uye tsoka dzezvikamu zvinogona kukanganisa kunaka kwepurasitiki uye kufanana kwayo. Vagadziri vanofanirwa kutevedzera nhungamiro dzeindasitiri uye maitiro akanakisa ekuvandudza dhizaini yePCB kuti maitiro epurasitiki abudirire.

Kudzora Hunhu uye Kuongorora :

Kuomarara kwemhando yekudzora uye maitiro ekuongorora akakosha kuti uone kunaka kweakapfava maPCB. Vagadziri vanoita ongororo yekuona, kuyerwa kwehukobvu, bvunzo dzekunamatira, uye magetsi ekuenderera mberi macheki kuti ave nechokwadi chekuti plating inosangana nezvinodiwa. Matanho ekudzora emhando anobatsira kuona uye kugadzirisa chero zvikanganiso zveplating kana nyaya nekukurumidza.

Kutevedzera Mitemo Yezvakatipoteredza :

Kutevedzera mitemo yezvakatipoteredza uye zviyero zveindasitiri kwakakosha muPCB plating. Vagadziri vanofanirwa kushandisa maitiro ane hushamwari kwezvakatipoteredza uye zviwanikwa uku vachiomerera kune zviyero zvakaita seRoHS (Kurambidzwa Kwezvinhu Zvinokuvadza). Kuzadzikisa izvi zvinodiwa kunovimbisa zvese zviri zviviri kunaka kwePCB yakapedzwa uye mutoro wezvakatipoteredza.

Kunyora Maitiro uye Kutevedza Kwazvo :

Manyoro akakwana uye kuteedzera mukati meiyo plating maitiro akakosha kune kusimbiswa kwemhando uye kugadzirisa matambudziko. Marekodhi echokwadi emaparamita emaitiro, zviwanikwa, uye mhedzisiro yekuongorora inogonesa vagadziri kuteedzera uye kugadzirisa chero kukanganisa kana nyaya dzinogona kumuka panguva yekuputira.

Kubudirira kwePCB plating ndeye mhedzisiro yekunyatsotarisisa kune izvi zvinofurira zvinhu, kuve nechokwadi chekuti chigadzirwa chekupedzisira chinosangana nezvinodiwa, chinoita nekuvimbika, uye chinomira kuomarara kwechinoda kushandiswa. Vagadziri vanoramba vachinatsa maitiro avo ekuputira uye matanho ekudzora emhando kuti vawane anowirirana uye emhando yepamusoro maPCB.

mhedziso

PCB plating inoita basa rakakosha mukugadzirwa kweakadhindwa edunhu mabhodhi, kuwedzera kusimba kwawo, magetsi conductivity, uye corrosion resistance. Iyi nzira yakazara inosanganisira nhanho dzehungwaru, kungwarira kusarudzwa kwezvinhu, uye kufunga kweakasiyana nzira dzekuisa uye kupera kwepamusoro. Nekunzwisisa kukosha kwePCB plating uye hukama hwayo hwakabatana, vagadziri vanogona kuona kuti maPCB avo anosangana nekuita kwakasimba uye kuvimbika zviyero. Pakupedzisira, PCB plating inomira sedombo repakona mukugadzirwa kwemidziyo yemagetsi, kuchengetedza kushanda kwavo uye hupenyu hurefu.