Hatisitsoeng oa potoloho boto (PCB) e ka aroloa ka PCB e thata ebile e fetoha le maemo PCB, ea pele e ka aroloa ka mefuta e meraro: PCB e le ‘ngoe, PCB e nang le mahlakore a mabeli le PCB e nang le mekato e mengata. According to the quality grade, PCB can be divided into three quality grades: 1, 2 and 3, of which 3 is the highest requirement. Liphapang tsa maemo a boleng ba PCB li lebisa ho rarahaneng le phapang ea mekhoa ea liteko le tlhahlobo.

Ho fihla joale, li-PCBS tse thata tse mahlakore a mabeli le tse mekato e mengata li nkile mefuta e mengata ea lits’ebetso ho elektroniki, ka linako tse ling PCBS e feto-fetohang e sebelisoa maemong a mang. Ka hona, pampiri ena e tla shebana le tlhahlobo ea boleng ba PCB e mahlakore a mabeli le e mekato e mengata. Kamora tlhahiso ea PCB, tlhahlobo e tlameha ho etsoa ho fumana hore na boleng bo fihlela litlhoko tsa moralo. It can be said that quality inspection is an important guarantee to ensure the quality of products and the smooth implementation of subsequent procedures.

Tekanyetso tekanyetso

Litekanyetso tsa PCB tsa tlhahlobo li kenyelletsa lintlha tse latelang:

Maemo a behiloeng ke naha ka ‘ngoe;

B. Maemo a sesole naheng ka ‘ngoe;

Litekanyetso tsa indasteri, joalo ka SJ / T10309;

Ditaelo tsa tlhahlobo ea PCB tse entsoeng ke mofani oa thepa;

E. Litlhoko tsa botekgeniki li tšoailoe ho PCB e takiloeng.

Bakeng sa li-PCBS tse fumanoeng li le bohlokoa ho lisebelisoa, likarolo tsena tsa bohlokoa le lits’oants’o li tlameha ho hlahlojoa ho tloha hloohong ho isa monoaneng ho kenyelletsa tlhahlobo e tloaelehileng.

Lintho tsa tlhahlobo

Ho sa tsotelehe mofuta oa PCB, ba tlameha ho feta ka mekhoa le mananeo a tšoanang a tlhahlobo ea boleng. According to the inspection method, the quality inspection items usually include appearance inspection, general electrical performance inspection, general technical performance inspection and metal coating inspection.

• Tlhahlobo ea ponahalo

Ho hlahloba habonolo ho bonolo ka thuso ea ‘musi, vernier caliper, kapa khalase e hōlisang. Lintho tse hlahlojoang li kenyelletsa:

A. Botenya, bokhabane ba bokaholimo le leqephe la ntoa la poleiti.

Litekanyo tsa ponahalo le kopano, haholo-holo litekanyo tsa kopano tse lumellanang le likhokelo tsa motlakase le litselana tsa tataiso.

C. Botšepehi le ho hlaka ha mokhoa oa ho khanna, le hore na ho na le lipotoloho tse khutšoane tsa borokho, lipotoloho tse bulehileng, li-burrs kapa likheo.

D. Boleng ba bokaholimo, ho sa tsotelehe na ho na le likoti, mengoapo kapa li-pinholes mohaleng o hatisitsoeng kapa mekatong.

E. Sebaka sa masoba a pad le masoba a mang. Lekola hore na masoba a haelloa kapa a chekiloe ka nepo, hore na bophara ba masoba bo fihlela litlhoko tsa moralo le hore na ho na le likotola le likheo.

F. Boleng le ho tiea ha seaparo sa pad, ho ba thata, ho khanya le sekheo sa liphoso tse phahamisitsoeng.

G. Bitiela boleng. Phallo ea motlakase e tšoana hantle, e tiile, boemo bo nepahetse, ts’ebetsong ke junifomo, ‘mala oa eona o lumellana le litlhoko tse nepahetseng.

H. Boleng ba semelo, joalo ka hore na bo tiile, bo hlakile ebile bo hloekile, ntle le mengoapo, ho phunya kapa ho roba.

• Tlhahlobo ea ts’ebetso ea motlakase khafetsa

Hona le mefuta e ‘meli ea liteko tlasa mofuta ona oa cheke:

Teko ea ts’ebetso ea khokahano. During this test, a multimeter is usually used to check the connectivity of the conductive pattern, with emphasis on the metallized perforations of double-sided PCBS and the connectivity of multi-layer PCBS. Bakeng sa teko ena, moetsi oa PCB o tla fana ka tlhahlobo ea tloaelo ea PCB e ngoe le e ngoe e khethiloeng pele e tloha ka tlung ea polokelo ho netefatsa hore mesebetsi ea eona ea mantlha ea phethahala.

Teko ea ts’ebetso ea ts’ireletso. Teko ena e etselitsoe ho lekola ts’ireletso ea ho itšireletsa sefofaneng se le seng kapa lipakeng tsa lifofane tse fapaneng ho netefatsa ts’ebetso ea ts’ireletso ea PCB.

• Tlhahlobo e akaretsang ea tekheniki

Kakaretso tlhahlobo botekgeniki koahela solderability le barbotage mamarello tlhahlobo. Bakeng sa tsa pele, lekola ho khutsisa ha solder molemong oa ho khanna. Bakeng sa ho qetela, tlhahlobo e ka etsoa ka malebela a tšoanelehang a hokeletsoeng ka holim’a lona hore a hlahlojoe ebe a ka tlosoa kapele leha a se a hatelletse. Ka mor’a moo, sefofane se lokela ho bonoa ho netefatsa hore se peeling sea etsahala. Ntle le moo, mekhoa e meng ea tlhahlobo e ka khethoa ho latela maemo a ‘nete, joalo ka matla a ho oa a koporo ea koporo le metallization ka matla a matla.

• Metallization ka tlhahlobo

Boleng ba metallized ka masoba bo bohlokoa haholo bakeng sa PCB e nang le mahlakore a mabeli le PCB e nang le mekato e mengata. Ho hloleha ho hongata ha li-module tsa elektroniki esita le lisebelisoa kaofela ho bakoa ke boleng ba masoba a nang le tšepe. Ka hona, ho hlokahala hore u ele hloko haholoanyane tlhahlobo ea metallized ka masoba. A. Sefofane sa tšepe sa lebota le phunyang se tla phetheha, se be boreleli ‘me se se ke sa ba le likoti kapa li-nodule tse nyane ka ho lekola metallization e koahelang lintlha tse latelang.

Lisebelisoa tsa motlakase li lokela ho hlahlojoa ho latela potoloho e khuts’oane e bulehileng ea sethala le metallized ka sekoaelo sa lesoba, le ho hanyetsa lipakeng tsa lesoba le loto.

C. Kamora tlhahlobo ea tikoloho, sekhahla sa phetoho ea ho hanyetsa sekoti ha sea lokela ho feta 5% ho isa 10%.

D. Matla a mechini e bua ka matla a tlamahanyang pakeng tsa lesoba le metallized.

E. Liteko tsa tlhahlobo ea Metallographic li hlahloba boleng ba ho roala, botenya ba seaparo le ho tšoana, le matla a mamarello lipakeng tsa ho roala le foil ea koporo.

Metallization ka tlhahlobo hangata e le motswako oa tlhahlobo ea pono le tlhahlobo ea mochini. Ho hlahloba ka mahlo ho kenyelletsa ho pepesetsa PCB leseli le ho bona hore na lebota le tiileng, le boreleli le phunyang le bonahatsa leseli ka ho lekana. Leha ho le joalo, marako a nang le li-nodule kapa voids a ke ke a khanya haholo. Bakeng sa tlhahiso ea molumo, sesebelisoa sa tlhahlobo ea inthanete (mohlala, mohlahlobi oa nale ea fofang) se lokela ho sebelisoa.

Ka lebaka la sebopeho se rarahaneng sa li-PCBS tse mekato e mengata, ho thata ho fumana liphoso kapele hang ha mathata a fumanoa nakong ea liteko tse latelang tsa kopano ea mochini oa yuniti. Ka lebaka leo, tlhahlobo ea boleng ba eona le ho ts’epahala ha eona e tlameha ho ba thata haholo. Ntle le lintho tse tloaelehileng tsa tlhahlobo tse tloaelehileng, lintho tse ling tsa tlhahlobo li kenyelletsa mekhahlelo e latelang: khanyetso ea mokhanni, metallization ka ho itšireletsa ka lesoba, potoloho e khuts’oane ea kahare le potoloho e bulehileng, ho hanyetsa ho kenella lipakeng tsa mela, ho koahela matla a mamarello, mamarello, ho hanyetsa tšusumetso ea mocheso tšusumetso e matla ea tšusumetso, matla a hona joale, jj. Letšoao le leng le le leng le tlameha ho fumanoa ka tšebeliso ea lisebelisoa le mekhoa e ikhethang.