PCB (guddiga wareegsan oo daabacan) waxaa loo qaybin karaa PCB adag iyo PCB dabacsan, kii hore waxaa loo qaybin karaa saddex nooc: PCB hal dhinac ah, PCB laba dhinac leh, iyo PCB-lakabyo badan. PCBS can be divided into three quality grades based on quality grade: Class 1, Class 2, and Class 3, with 3 of these having the highest requirements. Kala duwanaanshaha heerarka tayada PCB waxay horseedaan kala duwanaanshaha kakanaanta iyo tijaabinta iyo hababka kormeerka. Illaa iyo hadda, PCBS laba-dhinac leh iyo lakabyo badan leh ayaa ku xisaabtamaya codsiyo aad u tiro badan oo ku jira alaabta elektiroonigga ah, iyo mararka qaarkood PCBS dabacsan ayaa loo adeegsadaa xaaladaha qaarkood. Therefore, this paper will focus on the quality inspection of rigid double-sided and multi-layer PCBs. Ka dib marka la soo saaro PCB, waa in la baaro si loo ogaado in tayada ay ku habboon tahay shuruudaha naqshadeynta. It can be considered that quality inspection is an important guarantee of product quality and the smooth implementation of subsequent procedures.

Heerka kormeerka

PCB inspection standards mainly include the following aspects:

A. Heerarka dal walba dejiyay;

B. Heerarka milatari ee waddan kasta;

C. Heerka warshadaha sida SJ/T10309;

D. PCB inspection instructions formulated by equipment supplier;

E. Shuruudaha farsamo ee lagu calaamadeeyay sawirada naqshadeynta PCB.

For PCBS that have been identified as keyboards in equipment, these key characteristic parameters and indicators must be centralized and checked from the head, in addition to regular inspection. Si faraha lugaha.

Alaabta kormeerka

Iyadoo aan loo eegin nooca PCB -ga, waa inay maraan hababka kormeerka tayada oo la mid ah. Marka loo eego habka kormeerka, alaabada kormeerka tayada sida caadiga ah waxaa ka mid ah kormeer muuqaal ah, kormeerka waxqabadka korantada guud, kormeerka waxqabadka farsamada guud, iyo kormeeridda qiyaasidda.

• Kormeer muuqaal ah

Kormeerka muuqaalku waa sahlan yahay iyadoo la kaashanayo taliye, kalkaaliye vernier, ama muraayad weyneyso. Kormeerka waxaa ka mid ah:

A. dhumucda saxanka, xajmiga dusha, iyo warpage.

B. Qiyaasta muuqaalka iyo isu imaatinka, gaar ahaan cabbiraadaha isu imaatinka korontada iyo biraha hagaha.

C. Daacadnimada iyo hufnaanta qaababka tabinta iyo joogitaanka xiritaanka gaagaaban, buur furan, ama maran.

D. Tayada dushiisa, joogitaanka boholaha, xoqidda, ama godadka godadka ku yaal raad ama suuf. Location of pad holes and other holes. Godadka waa in la hubiyaa feer maqan ama khaldan, dhexroorka daloolku wuxuu buuxiyey shuruudihii naqshadaynta, iyo burooyinkii iyo faaruqintii.

F. Pad quality and firmness, roughness, brightness, and clearance of raised defects.

G. Tayada dahaarka. The coating flux is uniform and firm, the position is correct, the flux is uniform, and the color meets the requirements.

H. Tayada astaamaha, sida haddii ay yihiin kuwo adag, nadiif ah, oo nadiif ah, oo aan lahayn xoqan, dhexgal, ama jab.

• Kormeerka waxqabadka korontada guud

Waxaa jira laba imtixaan oo hoos yimaada baaritaanka noocan ah:

A. Connection performance test. Imtixaankan, multimeter ayaa sida caadiga ah loo adeegsadaa si loo hubiyo isku xirnaanta qaababka tabinta iyada oo loo marayo diirad-saaridda iyada oo loo marayo godadka PCBS-ka labada-dhinac leh iyo isku-xirnaanta PCBS-yada lakabyada badan leh. Imtixaankan, PCBCart wuxuu siiyaa hubin guud PCB kasta oo la soo saaray kahor intaysan ka bixin bakhaarkiisa si loo hubiyo in shaqooyinkiisa aasaasiga ah la fuliyay.

B. Tijaabadan waxaa loogu talagalay in lagu hubiyo iska caabbinta dahaarka ee isla diyaaradda ama inta u dhexeysa diyaaradaha kala duwan si loo hubiyo waxqabadka dahaarka ee PCB.

• Kormeer guud oo farsamo

General technical inspection includes weldability and electroplating adhesion inspection. Wixii hore, hubi qoyaanka qoyan ee alxanka ee qaabka tabinta. For the latter, it can be checked by qualified tips that are first glued to the plating surface to be examined and then quickly pulled out after being pressed evenly. Marka xigta, waa in la fiiriyaa diyaaradda dahaadhka si loo hubiyo in diirintu dhacdo. Intaa waxaa dheer, jeegaga qaarkood ayaa lagu xulan karaa iyadoo la eegayo xaaladda dhabta ah, sida xoog-ka-hortagga dhicitaanka naxaasta ah iyo xoogga ka-hortagga gilgilashada.

• Qalabaynta bilayska iyada oo loo marayo kormeer

Tayada godadka la cabbiray ayaa kaalin muhiim ah ka qaata PCB-ga laba-geesoodka ah iyo PCB-yada lakabyada badan leh. Guuldarrooyin aad u tiro badan oo ah cutubyada korantada iyo xitaa qalabka oo dhan waxaa sabab u ah tayada godadka la cabbiray. Therefore, it is necessary to pay more attention to the inspection of metalized holes. Kormeerka macdanta waxaa ka mid ah dhinacyada soo socda:

A. Diyaaradda birta ah ee gidaarka daloolka leh waa in ay ahaataa mid dhammaystiran oo siman, oo aan lahayn meel bannaan ama noodule.

B. Guryaha korontada waa in la hubiyaa iyada oo la raacayo wareegga gaaban iyo kan furan ee suufka iyo iska-caabbinta u dhexeysa godka daloolka iyo macdanta iyada oo loo marayo biraha biraha ee dahaarka dahaarka. After environmental testing, the resistance change rate of the through-hole should not exceed 5% to 10%. Mechanical strength refers to the bonding strength between the metalized through-hole and pad. Imtixaannada falanqaynta metallographic ayaa mas’uul ka ah hubinta tayada dahaadhka dahaadhka, dhumucda iyo sinnaanta dusha dahaadhka, iyo xoogga isku xidhka ee u dhexeeya dusha dahaadhka iyo biraha naxaasta ah.

Kormeerka biraha ayaa badiyaa lagu daraa kormeerka muuqaalka iyo kormeerka farsamada. Kormeerka aragga waa in la fiiriyo in PCB-ga la hoos geliyo iftiinka iyo in derbiga daloolka oo siman oo dhammaystiran uu si siman u iftiiminayo. Si kastaba ha ahaatee, ka gudubka darbiyada ay ku jiraan qanjirada ama meelaha bannaan ma ahaan doonaan kuwo dhalaalaya. Soosaarka baaxadda leh, kormeerka waa in lagu sameeyaa qalab tijaabin onlayn ah sida tijaabiyaha cirbadda duulaya.

Sababtoo ah qaab-dhismeedka kakan ee PCB-ka-lakabka badan, way adag tahay in si dhaqso ah loo ogaado ciladaha marka ay dhibaatooyin ka dhacaan imtixaannada isku-xidhka cutubka dambe. Sidaa darteed, hubinta tayadiisa iyo isku halaynteeda waa inay ahaato mid aad u adag. Marka lagu daro waxyaabaha korjoogteynta joogtada ah ee kor ku xusan, waxyaabaha kale ee kormeerka waxaa ka mid ah xuduudaha soo socda: iska caabin kaariye, iska caabbinta daloolka godka, wareegga gaagaaban ee gudaha, iyo wareegga furan, iska-caabbinta dahaarka ee u dhexeeya fiilooyinka, korantada korantada ee korontada saamaynta iska caabbinta, saamaynta farsamada, xoogga hadda jira, iwm. Tilmaame kasta waa in la helaa iyada oo la adeegsanayo qalab gaar ah iyo habab.