PCB Defects: Common mhando, Solutions, uye Dziviriro

Chii chinonzi PCB Defects?

Zvakajairwa PCB kukanganisa kunoreva chero kusarudzika kana kusarongeka kunoitika panguva yekugadzira iyo inotsauka kubva kune yakarongwa dhizaini kana basa. Izvi zvinokanganisa zvinogona kusimuka pamatanho akasiyana ekugadzira, kusanganisira etching, soldering, lamination, kana kunyangwe nekuda kwekukanganisa kwekugadzira. Hunhu hwakaomarara hwePCB, pamwe chete neiyo miniaturization yezvinhu zvemagetsi, zvinoreva kuti kunyangwe kutsauka kudiki kunogona kutungamirira kumatambudziko makuru.

Kudzivirira zvikanganiso kunotanga kugadzirwa kusati kwaitwa, saka zvikanganiso zvePCB zvinofanirwa kusanganiswa neongororo yekugadzira uye kusimbiswa kuburikidza nekuyedzwa kwemagetsi kwakakodzera.

Mhedzisiro yekukanganisa kwePCB inosvika kure. Muchiitiko chepamusoro-soro, kukanganisa kunogona kukonzera kukanganisa kudiki kana kudzikisira kugona mumudziyo. Nekudaro, mune zvakanyanya kuomarara, kukanganisa uku kunogona kukonzera kutadza kuzere kwechigadzirwa chemagetsi, kuisa njodzi yekurasikirwa nedata, kushanda nguva, uye kunyangwe njodzi yemuviri kana chishandiso chiri chinhu chakakosha mukuchengetedza system. Mumaindasitiri akaita seaerospace, mota, uye hutano hwehutano, uko kuvimbika kwakakosha, mhedzisiro yePCB hurema inogona kunyanya kuoma.

Kuongorora PCB Kukanganisa

Kuongorora hurema muPrinted Circuit Boards (PCBs) chinhu chakakosha chekuona kushanda kwavo uye kuvimbika. Kuongororwa kunoshanda hakungobatsiri chete mukugadzirisa zviri kuitika asi zvakare kunobatsira mukusimudzira maitiro ekugadzira ekugadzira ramangwana. Heino kutarisisa kwakadzama kwemaitiro uye maturusi anoshandiswa kuona marudzi akasiyana ePCB akaremara.

Matekiniki ekuona PCB Makanganiso

Visual Inspection: Iyi ndiyo inonyanya kukosha nzira yekuzivikanwa kwehurema. Vaongorori vanotarisa zviratidzo zvinooneka zvekuremara senge makatsemuka, misalignments, kana soldering zvikanganiso. Iyi nzira, kunyange yakatwasuka, inogona kusaona zvidiki kana kukanganisa mukati.

Automated Optical Inspection (AOI): Iyi nzira yepamberi inoshandisa makamera ane chigadziriso chepamusoro kutora mifananidzo yePCB nekuienzanisa nehurongwa hwakadzama. AOI inokwanisa kuona huwandu hwakasiyana-siyana hwepamusoro-soro senge makwara, mavara, kana kuisa zvinhu zvisirizvo.

X-Ray Inspection: Pakukanganisa kwemukati kusingaonekwi neziso rakashama, X-ray yekuongorora inoshandiswa. Iyi nzira inogona kuona nyaya senge layer misalignment, kutsemuka kwemukati, kana voids mumajoini anotengeswa.

In-Circuit Testing (ICT): ICT inosanganisira kuyedza kushanda kwemagetsi kwePCB. Inotarisa zvikabudura, kuvhura, kuramba, capacitance, uye humwe hunhu hwemagetsi kuti ive nechokwadi chekuti bhodhi rinoshanda sezvakarongwa.

Kushanda Kuyedzwa: Izvi zvinosanganisira kuyedza iyo PCB muchimiro chayo chekupedzisira, kutevedzera nharaunda yekushanda kuti ive nechokwadi chekuti inoita basa rayo.

Zvishandiso Zvinoshandiswa Pakuongorora

Magnifying Glass and Microscopes: Pakuongorora nemaoko, maturusi ekukudza akasiyana-siyana anoshandiswa kuona hurema hwepamusoro.

Michina yeAOI: Yakashongedzerwa nemakamera emhando yepamusoro uye software yekugadzirisa mifananidzo, michina iyi yakakosha pakuongorora otomatiki.

X-Ray Machines: High-resolution X-ray machines inopa yakadzama mifananidzo yemukati yema-multi-layered PCBs, ichibatsira kuona zvakavanzwa.

Multimeters uye Oscilloscopes: Anoshandiswa muICT, aya maturusi anoyera midziyo yemagetsi yezvikamu uye nzira dzedunhu.

Tsika Yekuyedza Rigs: Yakagadzirirwa kuyedza mashandiro, aya ma rigs akagadzirirwa kuyedza iyo PCB mumamiriro ekutevedzera ayo ekupedzisira mashandiro enzvimbo.

Mhando dzeCommon PCB Defects uye Solutions

1. Shorts uye Inovhura

Tsanangudzo: Shorts inoitika kana kubatanidza kusingatarisirwe kunoitwa pakati pematanho edunhu, nepo kuvhurwa kuri kupaza kwedunhu kunodzivirira kuyerera kwezvino.
Zvinokonzera: Shorts inogona kukonzerwa nekuwedzeredza solder bridging makwara ari padyo, nepo anovhura achiwanzo nekuda kwekusakwana soldering kana kukuvara maronda.
Mhinduro: Shandisa Automated Optical Inspection (AOI) kuona nyaya idzi. Kuvandudza solder paste application kurongeka uye kusimudzira etching maitiro anogona kudzivirira kukanganisa kwakadaro.

2. Solder Bridging

Tsanangudzo: Solder bridging inoitika apo solder inobatanidza mapini maviri kana anopfuura ari padyo asingafanirwe kubatanidzwa, zvichitungamira kune pfupi dunhu.
Impact: Inogona kupa PCB isingashande nekugadzira nzira dzemagetsi dzisiridzo.
Solution: Reflow soldering matekiniki uye kungwarira stencil dhizaini inogona kuderedza solder bhiriji. Masisitimu eAOI anoshandawo pakuona nyaya idzi pakuvamba mukugadzira.

3. Annular Ring Nyaya

Tsanangudzo: Zvindori zveAnnular inzvimbo dzakatenderera dzakatenderedza maburi akacherwa muPCB. Nyaya dzinomuka kana zvindori izvi zvatyoka kana kuti zvisina kukwana.
Zvinokonzera uye Zvigadziriso: Kurongeka kwakaringana panguva yekuchera uye kuona yakaringana mhangura yemhangura yakatenderedza makomba kunogona kudzivirira nyaya idzi. Kuongorora mushure mekuchera kunogona kubata nekugadzirisa chero zvisizvo.

4. Acid Misungo

Tsanangudzo: Acid misungo inoitika apo PCB dhizaini inotungamira mukuunganidzwa kweetching acids, zvichikonzera kuwanda-kudonha mune dzimwe nzvimbo.
Dambudziko Rakasikwa: Izvi zvinogona kunetesa PCB uye zvinotungamira mukutadza kwedunhu.
Mhinduro: Kugadzira makona akafara muPCB marongero anogona kudzivirira misungo yeasidhi. Pamusoro pezvo, kunyatsochenesa post-etching kunobatsira kubvisa chero asara acids.

5. Delamination

Kunzwisisa: Delamination inosanganisira kupatsanurwa kwePCB zvidimbu, kazhinji nekuda kwekupisa kwakanyanya kana kunyura.
Impact: Inokanganisa kutendeseka kwechimiro uye kushanda kwemagetsi kwePCB.
Solution: Kushandisa zvemhando yepamusoro zvinhu uye kudzora nharaunda yekugadzira (tembiricha uye humidity) kunogona kuderedza zvakanyanya njodzi yekudonha.

Kudzivirirwa kwePCB Kukanganisa

Kudzivirira kukanganisa muPrinted Circuit Boards (PCB) kwakakosha pakuona kuvimbika uye kushanda mumidziyo yemagetsi. Nekutora maitiro akanakisa muPCB dhizaini nekugadzira, akawanda akajairika hurema anogona kudzivirirwa. Heano mamwe akakosha maitiro ekudzivirira PCB kukanganisa:

1. Kuomerera kune Mazano ekugadzira

Kushandisa Mamiriro Akamisikidzwa: Kutevera indasitiri-yakajairwa nhungamiro yePCB dhizaini inobatsira mukudzivirira njodzi dzakajairika.
Dhizaini Yekugadzira (DFM): Batanidza misimboti yeDFM kuti uve nechokwadi chekuti PCB dhizaini inoshanda uye inogoneka pakugadzira isina kukanganisa.
Dzivisa Zvigadziriso Zvakaoma Pazvisina Kufanira: Rerutsa dhizaini pazvinogoneka kuderedza mikana yekukanganisa.

2. Kudzora Kwehutano muManufacturing Process

Kugara Kuongorora uye Kuyedzwa: Kuita yenguva dzose yekuongorora maitiro padanho rega rega rePCB yekugadzira maitiro kunobatsira mukuona kwekutanga kwezvingangoitika nyaya.
Automated Optical Inspection (AOI): Shandisa AOI kuona zvakakanganiswa sezvikabudura, kuvhura, uye bhiriji rekutengesa.
X-ray Inspection: Kune akaturikidzana maPCB, X-ray yekuongorora inoshanda pakuona hurema hwemukati husingaonekwe kunze.

3. Material Quality uye Kubata

Yepamusoro-Hunhu Zvishandiso: Kushandisa yakakwirira-giredhi zvinhu kunoderedza mikana yekuremara senge delamination uye warping.
Kuchengeta Uye Kuzvibata Kwakafanira: Iva nechokwadi chokuti zvinhu zvakachengetwa uye zvinobatwa zvakanaka kudzivirira kukuvara uye kusvibiswa.

4. Kudzora kwezvakatipoteredza

Humidity uye Tembiricha Kudzora: Kuchengetedza yakakwana mamiriro ezvakatipoteredza panguva yekugadzira kunodzivirira nyaya senge delamination uye kusarongeka.
Yakachena Manufacturing Environment: Nzvimbo yakachena uye inodzorwa inodzivirira kusvibiswa kunogona kukonzera kukanganisa.

5. Skilled Workforce

Kudzidziswa uye Unyanzvi: Vashandi vakanyatsodzidziswa kashoma kuita zvikanganiso mukugadzira maitiro.
Dzidzo Inoenderera mberi: Kuchengeta vashandi vakagadziridzwa neazvino maitiro ekugadzira uye zviyero.

6. Kushandiswa kweDzidziso dzeManufacturing Techniques

Up-to-Date Equipment: Kushandisa ichangoburwa tekinoroji yekugadzira kunogona kuwedzera iko kurongeka uye kuderedza zvikanganiso.
Process Optimization: Kuramba uchinatsa maitiro ekugadzira kuti uwedzere kushanda zvakanaka uye kuderedza mukana wekukanganisa.

7. Kudyidzana neVatengesi

Kusarudza Vatengesi Vanoremekedzwa: Kushanda nevashambadziri vane mukurumbira kunovimbisa kuti zvinhu uye zvinhu zvinoshandiswa ndezvemhando yepamusoro.
Kukurukurirana Kunobudirira: Kukurukurirana kwakajeka pamusoro pezvinodiwa uye zviyero nevatengesi zvinogona kudzivirira kusanzwisisana kunotungamira mukukanganisa.

mhedziso

Kudzivirira kukanganisa kwePCB inzira ine mativi mazhinji inosanganisira dhizaini yekungwarira, hunyanzvi hwekugadzira maitiro, kusarudzwa kwezvinhu zvemhando yepamusoro, uye vashandi vane hunyanzvi. Nekushandisa nzira dzekudzivirira idzi, vagadziri vanogona kuderedza zvakanyanya kuitika kwehurema, zvichitungamira kune akavimbika uye emhando yepamusoro maPCB. Izvi hazvisi chete kuchengetedza mari mukufamba kwenguva asi zvakare kunovimbisa kugutsikana kwevatengi uye kuvimbika kwechigadzirwa.

Pakuronga kugadzirwa, zvinobatsirawo kuenzanisa nyaya iyi nemaitiro ekuvimbisa mhando yePCB uye PCB conformal coating usati wapedzisa kugadzira kana kugadzira pasuru.