10 Mhando dzePCB Surface Inopedza: Zvese Zvaunoda Kuziva

MaPCB akabatanidzwa kumagetsi emazuva ano, uye kusarudzwa kwepamusoro pekupedzisira kunoita basa rakakosha mukuita uye kuvimbika kwezvikamu izvi. Surface inopedza kwete chete kuchengetedza mhangura kubva kune oxidation asi zvakare inoumba yakakosha interface pakati pebhodhi nezvikamu zvayo. Pano, isu tinoongorora gumi akajairwa mhando dzePCB pamusoro pekupedzisira, ichipa nzwisiso yakazara kune vemagetsi vanofarira uye nyanzvi.

1. HASL (Hot Air Solder Leveling)

HASL (Hot Air Solder Leveling) ndeimwe yemhando dzechinyakare dzePCB pamusoro pekupedzisira. Inoshandiswa zvakanyanya muindastiri nekuda kwekuita kwayo mukugadzirira maPCB ekutengesa. Muchirongwa cheHASL, PCB inonyikwa muhari yakanyungudutswa ye solder (inogona kuve ne lead-based kana lead-isina). Izvi zvinopfekedza nzvimbo dzemhangura dziri pachena ne solder. Mushure mekunyura, solder yakawandisa inobviswa nekupfuura PCB kuburikidza nemhepo inopisa mapanga, ayo anoyera iyo solder deposit.

zvayakanakira:

• Mutengo-Unoshanda: HASL ndeimwe yehupfumi hwepamusoro pekupedzisira inowanikwa.
• Yakareba Sherufu Hupenyu: Kupedzisa kunopa hupenyu hwakanaka hwesherufu, ichiita kuti ive yakakodzera stock uye kushandiswa kwenguva refu.
• Yakanakisa Solderability: Inopa yakanakisa solderability, iyo yakakosha kune yakavimbika solder joint.

nezvayakaipira:

• Haina Kukodzera Yakanaka-Pitch Zvikamu: Iyo isina kuenzana nzvimbo inogona kukonzera nyaya nediki diki zvikamu.
• Inotungamira Nyaya: Muchimiro chayo chekare, HASL inoshandisa lead, isingaenderane neRoHS. Nekudaro, HASL isina-lead inowanikwa.

2. Kutungamira-Isina HASL

HASL Isina Lead ishanduko yekugadzirwa kweHot Air Solder Leveling (HASL) yechinyakare, yakagadzirirwa kutevedzera mitemo yeRoHS . Inotsiva solder ine lead nezvimwe zvinoshandiswa zvisina lead. Kufanana neHASL yakajairwa, PCB inonyikwa muhari yakanyungudutswa yesolder isina lead. PCB inobva yaitwa nzira yekuenzanisa mhepo inopisa uko solder yakawandisa inobviswa, zvichisiya jira rakatetepa, rakaringana resolder isina lead pamapedhi.

zvayakanakira:

• RoHS Inopindirana: Chakanakira kukosha kutevedzera kwayo zviyero zveRoHS, zvichiita kuti ive yakakodzera kushandiswa mumatunhu ane yakasimba kutungamira-kushandisa mitemo.
• Hupenyu Hwakanaka HweSherufu: Senge HASL yechinyakare, inopa hupenyu hwakanaka hwesherufu uye inokodzera stock uye kushandiswa kwenguva refu.
• Yakanakisa Solderability: Inochengetedza yakanakisa solderability, yakakosha kune yakavimbika solder joint.

nezvayakaipira:

• Yakakwira Melting Point: Solder isina-Lead ine nzvimbo yakakwira yekunyungudika, iyo inogona kuunza matambudziko panguva yegungano.
• Surface Finish Irregularities: Zvakafanana neHASL yechinyakare, inogona kutungamira kune isina kuenzana nzvimbo, inogona kukanganisa kuunganidzwa kwezvidiki zvakanyanya kana zvakanaka-pitch zvikamu.

3.ENIG (Electroless Nickel Immersion Gold)

Electroless Nickel Immersion Gold (ENIG) inyanzvi uye inoshandiswa zvakanyanya pamusoro pekupedzisira muPCB indasitiri, inozivikanwa nekunaka kwayo kwepamusoro kuronga uye hupenyu hurefu hwesherufu. Pakutanga, hutete hwe nickel hunoiswa pamusoro pemhangura yePCB kuburikidza ne electroless plating process. Iyi nickel layer inoshanda sechipinganidzo kumhangura uye ndiyo hwaro hweiyo inotevera goridhe layer.
Pamusoro pe nickel, chidimbu chitete chegoridhe chinoshandiswa nekunyudzwa. Iyi nhanho inodzivirira nickel panguva yekuchengetedza uye inopa nzvimbo inotengeswa.

zvayakanakira:

• Flat Surface: ENIG inopa yakanyanya kufuratira nzvimbo, yakakosha pakumisikidza yakanaka-pitch pamusoro-inokwira zvikamu.
• Yakareba Sherufu Hupenyu: Iko kusanganiswa kwenickel negoridhe kunopa hupenyu hurefu hwesherufu uye yakagadzikana solderability.
• Corrosion Resistance: ENIG inopesana zvakanyanya nekuora, ichivimbisa hupenyu hurefu hwePCB.
• Inotungamira-Yemahara uye RoHS Inopindirana: Kupedzisa uku hakuna mutobvu, zvichiita kuti ive yakakodzera kushandiswa muRoHS-inoenderana application.

nezvayakaipira:

• Mutengo: Inodhura zvakanyanya kana ichienzaniswa nemamwe mapeji epamusoro, akadai seHASL.
• Black Pad Syndrome: Dzimwe nguva, ENIG inogona kutambura ne 'black pad syndrome', kukanganisa kunokanganisa kuvimbika kwejoint solder.
• Yakaganhurirwa Reworkability: Kana yangoputirwa, kushandazve kana kushandura iyo ENIG nzvimbo inogona kuve yakaoma.

4.ENEPIG (Electroless Nickel Electroless Palladium Immersion Gold)

Electroless Nickel Electroless Palladium Immersion Gold (ENEPIG) inzvimbo ine-akawanda-yepamusoro pekupedzisira inoshandiswa muPCB indasitiri, ine mukurumbira nekunaka kwayo magetsi emagetsi uye kuvimbika. Iyo nzira inotanga nekuiswa kweiyo nickel layer, yakafanana neENIG, ichipa chivharo chakasimba kune substrate yemhangura. Palladium layer inobva yaiswa pamusoro penickel. Palladium inoita semhinganidzo kudzivirira kupararira pakati penickel negoridhe. Chekupedzisira, mutete wakatetepa wegoridhe unoiswa pamusoro pepalladium kune yakanakisa yepamusoro conductivity uye oxidation kuramba.

zvayakanakira:

• Versatility: ENEPIG yakakodzera kune ese aluminium kubatanidza waya uye tambo yegoridhe yekubatanidza, zvichiita kuti zvive zvakasiyana-siyana.
• Kuvimbika muMagungano Akawanda: Kuvapo kwepalladium kunobvumira akawanda kutenderera kutenderera, kunowedzera kuvimbika kwayo.
• Yakanakisa Corrosion Resistance: Iyo yakaturikidzana chimiro inopa kuchengetedzwa kwepamusoro kubva mukuora.
• Lead-Yemahara uye RoHS Inopindirana: Kupedzisa uku zvakare hakuna kutungamira, kuenderana nemamiriro ekunze.

nezvayakaipira:

• Mutengo: ENEPIG imwe yeinodhura yepamusoro pekupedzisira nekuda kwekushandiswa kwepalladium negoridhe.
• Maitiro Kuomarara: Iwo akawanda akaturikidzana anoda chaiyo kudzora panguva yeplating maitiro kuti ave nechokwadi chemhando uye kuenderana.

5.Kunyudza Silver

Immersion Silver yakakurumbira PCB pamusoro pekupedzisira, inozivikanwa nekunaka kwayo magetsi conductivity uye pamusoro pekuti flatness. Iyo inodhura-inoshanda imwe nzira kune ENIG uye ENEPIG, inowanzo shandiswa mune yakakwira-frequency application. Kuita uku kunosanganisira kunyudzwa kwePCB mubhavhu rekugezera resirivha, uko chidimbu chitete chesirivheri chinoiswa pamusoro pemhangura. Post deposition, yakatetepa anti-tarnish layer inowedzerwa kuchengetedza sirivheri kubva kuoxidation uye kusvibisa.

zvayakanakira:

• Yakanakisa Conductivity: Silver yakakwira magetsi conductivity inoita kuti ive yakakodzera kune yakakwira-frequency application.
• Surface Planarity: Inopa nzvimbo yakati sandara, inobatsira kune yakanaka-pitch zvikamu kana yakaoma PCB dhizaini.
• Inotungamira-Yemahara uye RoHS Inopindirana: Kunyudza Sirivha inoenderana nenharaunda, inopindirana nepasi rose mazinga ezvakatipoteredza.
• Mutengo-Kushanda: Inopa chiyero pakati pekuita uye mutengo, zvichiita kuti ive sarudzo inoshanda kune akasiyana maapplication.

nezvayakaipira:

• Kubata Sensitivity: Nzvimbo dzeSirivha dzinogona kuve nehanya nekubata, zvinoda kunyatsorongedza uye kubata kudzivirira kusvibiswa.
• Yakaganhurirwa Sherufu Hupenyu: Kupedzisa kunogona kushatisa nekufamba kwenguva kana isina kuchengetwa zvakanaka kana kubatwa, zvichitungamira kune zvingangoitika panguva yekutengesa.

6. Kunyudza Tin

Kunyudzwa Tin ndeye PCB pamusoro pekupedzisira iyo yakawana mukurumbira nekuda kwekunaka kwayo solderability uye kuenderana ne lead-isina soldering maitiro. Iyo inonyanya kukosha kune yayo flat surface, ichiita kuti ive yakanaka kune yakanaka-pitch zvikamu. Mukuita uku, nzvimbo yemhangura yePCB yakavharwa nekemikari nekatete katete. Chidziviriro chekudzivirira chinowanzoiswa pamusoro petini kudzivirira oxidation uye kuchengetedza solderability.

zvayakanakira:

• Yakanakisa Solderability: Zvivakwa zveTin zvinoita kuti itengeseke zvakanyanya, kuve nechokwadi chekunyorova kwakanaka panguva yekushambadzira.
• Flat Surface: Inopa yakasarudzika nzvimbo yakati sandara, inobatsira kune yakanaka-pitch uye pamusoro pegomo zvinhu.
• Kutungamira-Kusununguka: Inopindirana neRoHS nemimwe mitemo yezvakatipoteredza, zvichiita kuti ive sarudzo inoenderera.
• Mutengo-Kushanda: Kazhinji inokwanisika kupfuura kupera senge ENIG kana ENEPIG, zvichiita kuti ive sarudzo-inoshamwaridzika bhajeti.

nezvayakaipira:

• Kubata Sensitivity: Tin nzvimbo dzinogona kuve nehanya nekubata uye zvakatipoteredza zvinhu, zvinogona kutungamira kune oxidation.
• Hupenyu Hwakaganhurirwa Sherufu: Kunyudza Tin inogona kushata nekufamba kwenguva, kunyanya kana yakafumurwa nekupisa nemhepo, ichideredza kutengeswa kwayo.
• Kukura kweWhisker: Pane mukana wekukura kwetinhi, izvo zvinogona kutungamira kune mapfupi maseketi mune mamwe mamiriro.

7. OSP (Organic Solderability Preservatives)

OSP, kana Organic Solderability Preservatives, ndeyekupedzisa kwepamusoro kunoshandiswa mukugadzira PCB kuchengetedza mhangura kubva kune oxidation kusvika kutengeswa. Iyi sarudzo ine hushamwari kwezvakatipoteredza yave kuwedzera mukurumbira mukugadzirwa kwemazuva ano PCB. Nzvimbo yemhangura yakanyatsocheneswa kubvisa tsvina. Mvura-based organic compound inoshandiswa, iyo inosungirirana nemhangura, ichiita chidziviriro chekudzivirira kurwisana neoxidation.

zvayakanakira:

• Inoenderana Nezvakatipoteredza: OSP haina mutobvu nemamwe masimbi anokuvadza, zvichiita kuti ive sarudzo ine hushamwari.
• Flat Surface: Inopa nzvimbo yakati sandara, inobatsira kune yakanaka-pitch uye yepamusoro-yakaiswa zvinhu.
• Mutengo-Unoshanda: Kazhinji inokwanisika kupfuura mamwe mapeji epamusoro, senge ENIG kana Immersion Silver.
• Kureruka kweKuongorora: Iyo yakajeka uye yakaonda OSP layer inobvumira kuongororwa kuri nyore kwepasi pemhangura.

nezvayakaipira:

• Yakaganhurirwa Sherufu Hupenyu: Iyo inodzivirira layer inodzikisira nekufamba kwenguva, izvo zvinogona kutungamirira kumatambudziko ne solderability kana ikasashandiswa nekukasira.
• Kubata Sensitivity: OSP coatings inonzwa kubata uye inogona kukuvadzwa nyore neminwe uye zvimwe zvinosvibisa.
• Hapana Multiple Reflow Cycles: OSP inopera haina kunaka kune maitirwo anoda akawanda kutenderera kutenderera, sezvo inodzivirira layer inogona kukanganisa.

8. Electrolytic Nickel/Gold (Hard Gold)

Electrolytic Nickel/Gold, inowanzonzi Hard Gold, ndeye yakasimba PCB pamusoro pekupedzisira, inoshandiswa zvakanyanya mumashandisirwo uko kusimba kwakanyanya uye kudzokororwa kupfeka zvinonetsa. Maitiro acho anotanga ne electroplating ye nickel pamapedhi emhangura ePCB. Chigadziko chegoridhe chinozoiswa electrolytically pamusoro penickel layer kuti iwedzere conductivity uye kuramba oxidation.

zvayakanakira:

• Kugara kwenguva refu: Ndarama yakaoma yakasimba zvakanyanya, ichiita kuti ive yakanakira nzvimbo dzekupfeka-yepamusoro senge edge yekubatanidza.
• Corrosion Resistance: Iyo yegoridhe layer inopa yakanakisa kuramba kukorona.
• Hurefu Hwesherufu Hupenyu: Kupera kwegoridhe rakaomarara kunochengetedza kuvimbika kwayo nekufamba kwenguva, ichipa hupenyu hurefu hwesherufu kana ichienzaniswa nekumwe kupera.

nezvayakaipira:

• Mutengo: Kuiswa kwegoridhe rakaomarara kunodhura kupfuura kumwe kupera kwepamusoro nekuda kwekushandiswa kwegoridhe.
• Yakaoma Maitiro: Iyo nzira inoda kunyatso kudzora uye yakanyanya kuoma kana ichienzaniswa nemamwe mapedzi.
• Haina Kukodzera Soldering: Nekuda kwekuoma kwayo uye ukobvu, haina kukodzera nzvimbo dzinotengeswa.

9. Electrolytic Wire Bondable Gold

Electrolytic Wire Bondable Goridhe ndeye yakasarudzika PCB pamusoro pekupedzisira, inonyanya kushandiswa mumashandisirwo anoda waya bonding - nzira yekugadzira hukama pakati pedunhu rakasanganiswa nePCB.

zvayakanakira:

• Yakanakisa Wire Bonding Properties: Iyo yekupedzisa inopa yakanakisa nzvimbo yekubatanidza waya, kunyanya negoridhe kana aluminium waya.
• Kuvimbika Kwakanyanya: Inosimbisa hukama hwakasimba uye hwakavimbika, hwakakosha mune yakakwirira-kuvimbika maapplication.
• Corrosion Resistance: Kufanana nemamwe goridhe kupera, inopa yakanakisa kuramba kukorona.

nezvayakaipira:

• Inodhura Maitiro: Inosanganisira huwandu hwakawanda hwegoridhe, kupera uku kunodhura kupfuura mamwe mazhinji.
• Haina Yakanakira Soldering: Ukobvu hweiyo goridhe layer inogona kuvharidzira inoshanda solder, ichimisa kushandiswa kwayo kunzvimbo dzakasungwa waya chete.
• Specialized Application: Iyo niche kupedzisa, isingawanzo shandiswa muyakajairwa PCB kugadzira nekuda kwehunhu hwayo uye mutengo.

10. Carbon Ink

Carbon Ink yakasarudzika PCB pamusoro pekupedzisira inoshandiswa kugadzira conductive nzvimbo uye maficha pane yakadhindwa yedunhu bhodhi. Haisi iyo yakajairwa kupedzisa kwebhodhi rese asi inoshandiswa munzvimbo chaidzo kuita mamwe mabasa.

zvayakanakira:

• Conductivity: Inopa inoitisa yepamusoro, inokodzera makiyipadhi, yekubata zviratidziro, uye zvimwe zvigadziriso zvekushandisa.
• Flexibility: Inogona kuiswa kune inoshanduka PCBs, ichiita kuti ive yakanaka kune inochinjika zvemagetsi.
• Mutengo-Unoshanda: Yakanyanya hupfumi pane kushandisa simbi dzakakosha kugadzira nzira dzekufambisa.

nezvayakaipira:

• Yakaganhurirwa Conductivity: Isina conductive pane simbi inopera, ichidzikamisa kushandiswa kwayo mune yakakwirira-simba kana yakakwirira-frequency application.
• Kupfeka uye Kubvarura: Zvinonyanya kukurumidza kupfeka kupfuura simbi inopera, izvo zvinogona kunetsa mune yakakwirira-kushandisa interfaces.
• Environmental Sensitivity: Inogona kuderera nekufamba kwenguva nekuda kwezvakatipoteredza zvakaita sehunyoro kana tembiricha yakanyanyisa.