Kungani kudingeka ikhava ngegolide nge-PCB?

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I-OPP: Izindleko eziphansi, ukuqina okuhle, izimo zokugcina ezinzima, isikhathi esifushane, ubuchwepheshe bezemvelo, ukushibilika okuhle, bushelelezi ...

I-Hasl: Imvamisa yi-Multilayers HDI PCB Samples (4 - 46 izingqimba zokuxhumana eziningi ezinkulu, amakhompyutha, imishini yezokwelapha kanye namabhizinisi wezokwelapha kanye namabhizinisi acwaninga.

Umunwe wegolide: Ukuxhumana phakathi kwe-memory slot ne-chip ye-memory, wonke amasiginali athunyelwa ngomunwe wegolide.

Umunwe wegolide wegolide usula oxhumana nabo abaningi begolide, ababizwa ngokuthi "umunwe wegolide" ngenxa yendawo yabo enezindiza zegolide kanye nelungiselelo labo elinjengeminwe. Umunwe wegolide empeleni usebenzisa inqubo ekhethekile yokubopha ukuqunjelwa kwe-Cold ngegolide, okumelana kakhulu ne-oxidation futhi kuyaqhuba kakhulu. Kepha intengo yegolide iyabiza, i-tin pluting yamanje isetshenziselwa ukufaka imemori eyengeziwe. Kusukela ngekhulu leminyaka elidlule, impahla kathayela yaqala ukusakazeka, ibhodi lenkumbulo, nememori, namadivayisi wevidiyo afana neseva / i-WordStation "kuphela yeseva yokuxhumana esetshenziselwa ukuqhubeka nomkhuba wokusebenzisa igolide plated, ngakho-ke intengo inokubiza kancane.

  1. Kungani usebenziseibhodi legolide legolide?

Ngokuhlanganiswa kwe-IC ephakeme nangaphezulu, izinyawo ze-IC ziye ngaphezulu. Ngenkathi inqubo yokufafaza eqonde mpo kunzima ukushaya iflethi ye-welding enhle, eletha ubunzima ekukhungethekeni kwe-SMT; Ngaphezu kwalokho, impilo yeshelufu yepuleti yokufafaza i-tin imfushane kakhulu. Kodwa-ke, ipuleti legolide lixazulula lezi zinkinga:

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2.) Esigabeni Sentuthuko, ithonya lezinto ezifana nokuthengwa kwezakhi imvamisa akuyona iBhodi eya kumaviki ambalwa, kepha ngokuvamile kufanele lilinde amasonto ambalwa noma izinyanga ze-Metal izikhathi eziningi, ngakho-ke wonke umuntu uzimisele ukwamukela. Ngaphandle kwalokho, i-PCB yegolide-plated ngamadigri wezindleko zesigaba sesampula iqhathaniswa namapuleti asePewter

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4.) Kepha nge-wiring eningi futhi enobubanzi, ububanzi be-line, izikhala zifinyelele ku-3-4mil

Ngakho-ke, kuletha inkinga yesifunda esifushane socingo lwegolide: Imvamisa eyandayo yesiginali, ithonya lokudluliselwa kwesiginali ezitsheni eziningi ngenxa yomthelela wesikhumba ngenxa yokusobala isikhumba

(Umphumela Wesikhumba: Imvamisa ephezulu yokushintsha yamanje, izothambekela ekugxiliseni kobuso be-wire flow. Ngokuya ngokubalwa, ukujula kwesikhumba kuhlobene nokuvama.)

  1. Kungani usebenziseimfiphoma yegolide yegolide?

Kunezici ezithile ze-PCB ye-PCB ye-Word yokucwilisa njengoba ngezansi:

1 Lapho-ke ukucindezelwa kweplate yegolide engaphansi kulula ukuyilawula, okulungele kakhulu ukucubungula kwemikhiqizo. Ngasikhathi sinye futhi ngoba igolide lithambile kunegolide, ngakho-ke ipuleti legolide aligqokile - ukumelana nomunwe wegolide.

2.) Igolide lokucwilisa kulula ukuwela ukwedlula ukufakwa kwegolide, futhi ngeke kubangele izikhalazo ze-welding nezamakhasimende.

3.) Igolide le-nickel litholakala kuphela ephepheni le-welding ku-Enig PCB, ukuhanjiswa kwesiginali emphumeleni wesikhumba ku-waler yethusi, ngeke kuholele isibonakaliso, futhi ungaholeli umjikelezo ofushane ocingweni lwegolide. I-soldermask esifundeni ihlanganiswa ngokuqinile nezendla zethusi.

4.) Ukwakheka kwe-crystal yegolide yokucwiliswa yigolide kunethanga legolide, kunzima ukukhiqiza i-oxidation

5.) Ngeke kube nomthelela ekuchithekeni lapho kwenziwa isinxephezelo

6.) Ifulethi nempilo yenkonzo yepuleti yegolide muhle njengaleso sepuleti legolide.

 

  1. Ukucwilisa igolide vs plating ngegolide

 

Kunezinhlobo ezimbili zobuchwepheshe bezinhlu zegolide zegolide: enye iyinhlangano yegolide kagesi, enye yigolide lokucwilisa

 

Ngenqubo ye-Gold Plating, umphumela we-tin wehliswa kakhulu, futhi umphumela wegolide ungcono; Ngaphandle kokuthi umenzi udinga ukubopha, noma manje iningi labakhiqizi lizokhetha inqubo yokucwila yegolide!

Ngokuvamile, ukwelashwa komhlaba kwe-PCB kungahlukaniswa ngezinhlobo ezilandelayo: I-Electroplating, Igolide Lokucwilisa) Ku-tin goad god (edla umpofu we-tin) lokhu uma ukususwa kwabakhiqizi bama-paste kanye nezizathu zokucubungula ezibonakalayo.

Kunezizathu ezithile zenkinga ye-PCB:

  1. Ngesikhathi sokuphrinta kwe-PCB, noma ngabe kukhona indawo eqondile yamafutha epanini, kungavimba umphumela we-tin; Lokhu kungaqinisekiswa ngovivinyo lokuzithandela lwe-solder

  2. Ukuthi isikhundla sokuhlobisa i-pan singahlangabezana nezidingo zokuklama, okungukuthi, noma ngabe i-welding pad ingenziwa yini ukuqinisekisa ukusekelwa kwezingxenye.

  3. I-welding pad ayingcolisiwe, engalinganiswa ngokungcoliswa kwe-ion; t

Mayelana nobuso:

I-Plating yegolide, kungenza isikhathi sokugcina se-PCB isikhathi eside, futhi ngokushisa kwangaphandle kwemvelo kanye nokushintshwa komswakama kuncane (kuqhathaniswa nokunye ukwelashwa okungaphezulu), ngokuvamile, kungagcinwa isikhathi esingangonyaka; I-Hasl noma ihole ukwelashwa okungaphezulu kwe-hasl ye-hasl yesibili, i-OSP futhi, ukwelashwa okubili okungaphezulu kokushisa kwemvelo nesikhathi sokugcina umswakama ukuze unake kakhulu

Ngaphansi kwezimo ezijwayelekile, ukwelashwa okuphezulu kwesiliva kuhlukile kancane, inani lentengo liphezulu, izimo zokulondolozwa zifunwa kakhulu, isidingo sokusebenzisa i-sulfur iphepha lokupakisha iphepha! Futhi uyigcine cishe izinyanga ezintathu! Emthethweni wethayela, igolide, i-osp, i-tin fafaza empeleni ecishe ibe, abakhiqizi ikakhulukazi ukucubungula ukusebenza kwezindleko!