Mbadamba circuit (PCB) nwere ike kewaa PCB siri ike na PCB na-agbanwe agbanwe, enwere ike kewaa nke mbụ n’ụdị atọ: PCB nwere otu akụkụ, PCB nwere ihu abụọ na PCB nwere ọtụtụ. According to the quality grade, PCB can be divided into three quality grades: 1, 2 and 3, of which 3 is the highest requirement. Ọdịiche dị na ogo ogo PCB na -ebute ịdị mgbagwoju anya na iche na ụzọ nnwale na nyocha.

Ka ọ dị ugbu a, PCBS nwere akụkụ nwere akụkụ abụọ na akwa nwere ọtụtụ ngwa nwere ngwa elektrọnik, yana PCBS na-agbanwe agbanwe mgbe ụfọdụ ejiri ya n’ọnọdụ ụfọdụ. Ya mere, akwụkwọ a ga-elekwasị anya n’ịdị mma nke PCB nwere ihu abụọ na ọtụtụ akwa. Mgbe nrụpụta PCB gasịrị, a ga -eme nyocha iji chọpụta ma ịdị mma ahụ ruru ihe achọrọ. It can be said that quality inspection is an important guarantee to ensure the quality of products and the smooth implementation of subsequent procedures.

Nnyocha nyocha

Ụkpụrụ nyocha PCB tumadi gụnyere akụkụ ndị a:

A. Ụkpụrụ nke obodo ọ bụla setịpụrụ;

B. Ụkpụrụ agha maka obodo ọ bụla;

C. Ụkpụrụ ọrụ, dị ka SJ/T10309;

D. Ntụle nyocha PCB nke onye na -eweta akụrụngwa mepụtara;

E. Nka na ụzụ chọrọ akara na eserese PCB.

Maka PCBS nke achọpụtala dị ka ihe dị mkpa maka akụrụngwa, a ga -enyocha njiri mara njiri mara njiri mara nke a site na isi ruo n’ọbọ ụkwụ na mgbakwunye nyocha oge niile.

Ihe nyocha

N’agbanyeghị ụdị PCB, ha ga -agarịrị ụzọ nyocha na mmemme dị mma. 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.

• Nnyocha ọdịdị

Nnyocha anya dị mfe site n’enyemaka nke onye na -achị achị, vernier caliper, ma ọ bụ iko na -ebuli elu. Ihe enyochapụtara gụnyere:

A ọkpụrụkpụ, n’elu roughness na warpage nke efere.

B. Ọdịdị na nha ọgbakọ, ọkachasị akụkụ ọgbakọ dakọtara na njikọ eletriki na ụzọ ntuziaka.

C. Iguzosi ike n’ezi ihe na idoanya nke ụkpụrụ mmebe, yana ma enwere okirikiri sekit dị warara, okirikiri mepere emepe, burrs ma ọ bụ oghere.

D. Ogo elu, ma enwere olulu, ọkọ ma ọ bụ pinholes na wires ma ọ bụ mpe mpe akwa.

E. Ọnọdụ nke oghere pad na oghere ndị ọzọ. Lelee ma oghere ndị ahụ na -efu ma ọ bụ na -akụghị n’ụzọ na -ezighi ezi, ma dayameta nke oghere ndị ahụ na -emezu ihe achọrọ yana ma enwere nodules na oghere.

F. Ogo na nkwụsi ike nke mkpuchi mpe mpe akwa, ịdị ncha, nchapụta na ntụpọ nke ntụpọ etolitere.

G. Mkpuchi mkpuchi. Mgbanwe electroplating bụ edo edo, guzosie ike, ọnọdụ ziri ezi, mmụba bụ edo, agba ya kwekọrọ n’ihe ndị achọrọ.

H. Ogo agwa, dị ka ma ha siri ike, doo anya ma dị ọcha, na -enweghị ọkọ, ntụpọ ma ọ bụ nkwụsịtụ.

• Nnyocha arụmọrụ eletriki na -adị kwa oge

Enwere ụdị ule abụọ n’okpuru ụdị nlele a:

A. Nnwale arụmọrụ njikọ. 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. Maka ule a, onye nrụpụta PCB ga -enye nyocha nke PCB ọ bụla etinyere tupu ọ pụọ n’ụlọ nkwakọba ihe iji hụ na emezuru ọrụ ya.

B. Nnwale arụmọrụ mkpuchi. Emebere ule a iji lelee nguzogide mkpuchi otu ụgbọ elu ma ọ bụ n’etiti ụgbọ elu dị iche iche iji hụ na PCB na -arụ ọrụ mkpuchi.

• Nnyocha teknụzụ izugbe

Nnyocha teknụzụ izugbe na -ekpuchi solderability na mkpuchi nrapado mkpuchi. Maka nke mbụ, lelee ịdị nro nke onye na -ere ya na ụkpụrụ na -eduzi. Maka nke ikpeazụ, a ga -eme nyocha site na ndụmọdụ ruru eru nke a na -arapara na mbụ na plating ka a ga -enyocha wee nwee ike wepu ya ngwa ngwa ọbụlagodi mgbe ịpịchara. Na -esote, ekwesịrị ịhụ ụgbọ elu plating iji hụ na peeling pụtara. Na mgbakwunye, enwere ike ịhọrọ ụfọdụ ụzọ nyocha dabere na ọnọdụ ahụ n’ezie, dị ka ọdịda ọdịda nke foil ọla na imepụta site na ike ndọda.

• Ịmegharị ihe site na nyocha

Ogo nke metallized site na oghere dị ezigbo mkpa maka PCB nwere ihu abụọ na PCB nwere ọtụtụ. Ọtụtụ ọdịda nke modulu eletrọnịkị na ọbụlagodi akụrụngwa niile bụ n’ihi ịdị mma nke oghere ndị mebiri emebi. Ya mere, ọ dị mkpa ị paya ntị nke ukwuu na nyocha nke metallized site na oghere. A. Ụgbọ elu igwe nke mgbidi oghere ga -abụ nke zuru oke, dị larịị na enweghị oghere ma ọ bụ obere nodules site na ịlele imepụta igwe na -ekpuchi akụkụ ndị a.

B. Ekwesịrị ịlele akụrụngwa eletriki dịka okirikiri mkpirisi na oghere mepere emepe na metallized site na mkpuchi oghere, yana nguzogide n’etiti oghere na ụzọ.

C. Mgbe nyocha gburugburu ebe obibi, ọnụego mgbanwe nguzogide nke oghere agaghị agafe 5% ruo 10%.

D. Mechanical ike na -ezo aka ike nkekọ n’etiti oghere metallized na mpe mpe akwa.

E. Nnwale nyocha Metallographic na -enyocha ịdị mma mkpuchi, ọkpụrụkpụ mkpuchi na ịdị n’otu, yana ike nrapado n’etiti mkpuchi na foil ọla.

Ịmegharị ihe site na nyocha na -abụkarị ngwakọta nke nyocha anya na nyocha igwe. Nnyocha anya na-agụnye ikpughere PCB n’ìhè ma hụ ma ọ bụrụ na mgbidi na-adịghị mma, nke na-enweghị oghere na-egosipụta ìhè nhata. Agbanyeghị, mgbidi nwere nodules ma ọ bụ oghere agaghị adị oke ọkụ. Maka imeputa olu, ekwesịrị iji ngwaọrụ nyocha in-line (dịka ọmụmaatụ, onye na-enyocha agịga na-efe efe).

N’ihi usoro dị mgbagwoju anya nke PCBS nwere ọtụtụ, ọ na-esiri ike ịchọta mmejọ ngwa ngwa ozugbo achọtara nsogbu n’oge ule mgbakọ modul sochirinụ. N’ihi nke a, nyocha nke ịdị mma ya na ntụkwasị obi ya ga -abụrịrị nke siri ike. Na mgbakwunye na ihe nlele oge niile dị n’elu, ihe nyocha ndị ọzọ gụnyekwara usoro ndị a: nguzogide onye na -eduzi ihe, imepụta ihe site na nkwụsi ike oghere, sekit dị mkpụmkpụ n’ime na sekit mepere emepe, nkwụsị mkpuchi n’etiti ahịrị, ike nrapado mkpuchi, nrapado, nguzogide mmetụta ọkụ, igwe. mmetụta mmetụta mmetụta, ike ugbu a, wdg. A ga -enwerịrị ihe ngosi ọ bụla site na iji akụrụngwa na ụzọ pụrụ iche.