Yadda ake gujewa buga allon kewayawa warping

1. Rage tasirin zafin jiki akan damuwa na jirgin
Tunda [zazzabi] shine babban tushen damuwa na allo, idan dai yanayin zafin tanda ya ragu ko kuma saurin dumama allo da sanyaya a cikin tanda mai juyawa ya ragu sosai, za a iya rage wargin na PCB sosai.Koyaya, wasu illolin na iya faruwa, kamar guntun wando mai siyarwa.

2. Yi amfani da babban Tg takardar
Tg shine yanayin canjin gilashin, wato, yanayin zafin da kayan ke canzawa daga yanayin gilashi zuwa yanayin roba.Ƙananan ƙimar Tg na kayan, da sauri jirgin ya fara yin laushi bayan shigar da tanda mai juyawa, da kuma lokacin da yake ɗauka don zama yanayin roba mai laushi.Har ila yau, zai yi tsayi, kuma nakasar allon zai zama mafi tsanani.Yin amfani da takardar Tg mafi girma zai iya ƙara ƙarfinsa don jure wa damuwa da lalacewa, amma farashin kayan da ya dace kuma yana da girma.

3. Ƙara kauri na allon kewayawa
Don cimma haske da ƙarancin kauri na samfuran lantarki da yawa, an bar kaurin allon a 1.0mm, 0.8mm, har ma da 0.6mm.Irin wannan kauri ya kamata ya kiyaye allon daga lalacewa bayan wucewa ta cikin tanderun da aka sake fitarwa, wanda yake da wahala sosai.Masana'antar PCB ta ba da shawarar cewa idan babu wani buƙatu don haske da siriri, zai fi dacewa hukumar ta yi amfani da kauri na 1.6mm, wanda zai iya rage haɗarin wargegi da nakasar allon PCB.

4. Rage girman allon kewayawa kuma rage adadin bangarori
Tunda yawancin tanda masu sake juyawa suna amfani da sarƙoƙi don fitar da allon da'irar gaba, mafi girman allon da'irar za ta zama haƙarƙari kuma za ta zama naƙasa a cikin tanda mai juyawa saboda nauyinsa, don haka gwada sanya dogon gefen allon a matsayin gefen allo.A kan sarkar tanderun da aka sake fitarwa, za a iya rage nakasar daɗaɗɗen da nauyin da'irar ke yi da kanta.Wannan kuma shi ne dalilin rage yawan bangarori.Wato, lokacin wucewa tanderu, yi ƙoƙarin yin amfani da kunkuntar gefen don zama perpendicular zuwa ga tanderun shugabanci, wanda zai iya cimma mafi ƙasƙanci The adadin concave nakasawa.

5. Yi amfani da tiren tire na tanda
Idan hanyoyin da ke sama suna da wuyar cimmawa, abu na ƙarshe shine a yi amfani da tiren tanda (sake fitar da mai ɗaukar hoto/samfurin) don rage nakasar allon kewayawa.Ka'idar cewa injin tire na tanda zai iya rage warpage na hukumar PCB shine saboda kayan kayan aikin gabaɗaya.Aluminum gami ko dutsen roba za a yi amfani da shi don samun juriya mai zafin jiki, don haka masana'antar PCB za ta bar allon kewayawa ta wuce babban zafin zafin jiki na faɗaɗawar tanda da kuma raguwar sanyi bayan sanyi.Tire na iya kunna aikin daidaita allon kewayawa.Bayan zafin jiki na farantin yana ƙasa da ƙimar Tg kuma ya fara farfadowa da taurare, ana iya kiyaye girman asali.

Idan madaidaicin tire mai Layer guda ɗaya ba zai iya rage nakasar ba allon kewayawa , Dole ne ku ƙara murfin murfin don matsa allon da'irar tare da manyan tire na sama da na ƙasa, wanda zai iya rage nakasar da'irar ta cikin tanda mai juyawa..Duk da haka, wannan tire na tanda yana da tsada sosai, kuma dole ne ka ƙara aiki don ajiyewa da sake sarrafa tiren.

6. Yi amfani da na'ura mai ba da hanya tsakanin hanyoyin sadarwa maimakon V-Cut's sub-board
Tun da V-Cut zai lalata ƙarfin tsarin tsarin panel tsakanin allunan, gwada kada ku yi amfani da ƙaramin allo na V-Cut, ko rage zurfin V-Cut.

Wata tambaya, don Allah RFQ .