Lokacin zayyana allunan da'ira da aka buga (PCBs), zabar hanyar tarawa da ta dace yana da mahimmanci. Ya danganta da buƙatun ƙira, hanyoyin tarawa daban-daban, kamar tari da tari, suna da fa'idodi na musamman.A cikin wannan gidan yanar gizon, za mu bincika yadda za a zaɓi hanyar tarawa daidai, la'akari da dalilai kamar amincin sigina, rarraba wutar lantarki, da sauƙin ƙira.
Fahimtar hanyoyin tarawar PCB mai yawan Layer
Multilayer PCBs sun ƙunshi yadudduka da yawa na kayan sarrafawa waɗanda aka rabu ta hanyar insulating yadudduka. Adadin yadudduka a cikin PCB ya dogara da sarkar ƙira da buƙatun kewayawa. Hanyar tarawa ta ƙayyade yadda aka tsara yadudduka da haɗin kai. Bari mu dubi dabaru daban-daban da aka saba amfani da su a cikin ƙirar PCB mai yawan Layer.
1. Enclave stacking
Enclave stacking, kuma aka sani da matrix stacking, hanya ce da aka saba amfani da ita a ƙirar PCB mai yawan Layer. Wannan tsarin tarawa ya ƙunshi haɗa takamaiman yadudduka tare don samar da yanki mai jujjuyawa a cikin PCB. Enclave stacking yana rage girman magana tsakanin ƙungiyoyi daban-daban, yana haifar da ingantaccen sigina. Hakanan yana sauƙaƙe ƙirar hanyar rarraba wutar lantarki (PDN) saboda ana iya haɗa wutar lantarki da jiragen ƙasa cikin sauƙi.
Duk da haka, ƙwanƙwasa tari kuma yana kawo ƙalubale, kamar wahalar bin hanyoyi tsakanin ɓangarori daban-daban. Dole ne a yi la'akari da hankali don tabbatar da cewa hanyoyin sigina ba su da tasiri ta iyakokin maɓalli daban-daban. Bugu da ƙari, ƙwanƙwasawa na iya buƙatar ƙarin hadaddun hanyoyin masana'antu, wanda ke ƙara farashin samarwa.
2. Simmetric stacking
Stacking Symmetric wata dabara ce ta gama gari a ƙirar PCB masu yawa. Ya ƙunshi tsari mai ma'ana na yadudduka a kusa da jirgin sama na tsakiya, yawanci ya ƙunshi wutar lantarki da jiragen ƙasa. Wannan tsari yana tabbatar da ko da rarraba sigina da iko a duk faɗin PCB, rage girman karkatar da sigina da inganta amincin sigina.
Stacking na simmetric yana ba da fa'idodi kamar sauƙi na masana'anta da mafi kyawun ɓata zafi. Zai iya sauƙaƙa tsarin masana'antar PCB kuma ya rage abin da ya faru na damuwa na thermal, musamman a aikace-aikace masu ƙarfi. Koyaya, tari mai ma'ana bazai dace da ƙira tare da ƙayyadadden buƙatun impedance ko sanya sassan da ke buƙatar shimfidar asymmetric ba.
Zaɓi hanyar tarawa daidai
Zaɓin hanyar tarawa da ta dace ya dogara da buƙatun ƙira iri-iri da cinikin ciniki. Ga wasu abubuwan da ya kamata a yi la'akari:
1. Mutuncin sigina
Idan amincin sigina muhimmin abu ne a cikin ƙirar ku, tari na iya zama mafi kyawun zaɓi. Ta hanyar keɓance ƙungiyoyi daban-daban na yadudduka, yana rage yiwuwar tsangwama da yin magana. A gefe guda, idan ƙirar ku tana buƙatar daidaitaccen rarraba sigina, tari mai ma'ana yana tabbatar da ingantaccen sigina.
2. Rarraba wutar lantarki
Yi la'akari da buƙatun rarraba wutar lantarki na ƙirar ku. Enclave stacking yana sauƙaƙe hanyoyin rarraba wutar lantarki saboda ana iya haɗa wutar lantarki da jiragen ƙasa cikin sauƙi. Stacking Symmetric, a daya bangaren, yana samar da daidaitaccen rarraba wutar lantarki, rage raguwar wutar lantarki da rage abubuwan da suka shafi wutar lantarki.
3. Kariyar masana'anta
Ƙimar ƙalubalen masana'antu masu alaƙa da hanyoyin tarawa daban-daban. Ƙunƙarar tari na iya buƙatar ƙarin hadaddun hanyoyin masana'antu saboda buƙatar hanyar igiyar igiyar igiyar igiya tsakanin ɓangarori. Stacking simmetrical ya fi daidaito da sauƙi don ƙira, wanda zai iya sauƙaƙe tsarin masana'anta da rage farashin samarwa.
4. Ƙuntataccen ƙira na musamman
Wasu ƙira na iya samun ƙayyadaddun iyakoki waɗanda ke sanya hanyar tarawa ta fi son wani. Misali, idan ƙirar ku tana buƙatar takamaiman kulawar impedance ko jeri bangaren asymmetric, tari na iya zama mafi dacewa.
tunani na ƙarshe
Zaɓi hanyar tara PCB mai yawan Layer da ya dace mataki ne mai mahimmanci a cikin tsarin ƙira. Lokacin yanke shawara tsakanin tarkace tari da tari, la'akari da dalilai kamar amincin sigina, rarraba wutar lantarki, da sauƙin ƙira. Ta hanyar fahimtar ƙarfi da iyakoki na kowace hanya, zaku iya haɓaka ƙirar ku don biyan buƙatun sa da kyau.
Lokacin aikawa: Satumba-26-2023
Baya
