Kwaphela amashumi eminyaka, I-PCB ye-multilayer bekulokhu okuqukethwe okuyinhloko kwenkambu yokuklama. Njengoba izingxenye ze-elekthronikhi zishwabana, okuvumela amasekhethi engeziwe ukuthi akhelwe ebhodini elilodwa, imisebenzi yawo yandisa isidingo somklamo omusha we-PCB nobuchwepheshe bokukhiqiza obuzisekelayo. Kwesinye isikhathi ukupakishwa kwebhodi kwezingqimba eziyisi-6 kuyindlela nje yokuthola imikhondo eminingi ebhodini kunalokho okuvunyelwe ibhodi elinezingqimba ezi-2 noma ezine. Manje, ukudala ukucushwa kongqimba okulungile kusitaki sezendlalelo eziyisi-4 ukuze kukhuliswe ukusebenza kwesifunda kubaluleke kakhulu kunangaphambili.

Ngenxa yokusebenza kabi kwesignali, izitaki zesendlalelo ze-PCB ezilungiselelwe ngokungalungile zizothintwa ukuphazanyiswa kwe-electromagnetic interference (EMI). Ngakolunye uhlangothi, i-stack ye-6-layer eklanywe kahle ingavimbela izinkinga ezibangelwa i-impedance ne-crosstalk, futhi ithuthukise ukusebenza nokuthembeka kwebhodi lesifunda. Ukucushwa kwesitaki esihle kuzosiza futhi ukuvikela ibhodi lesifunda emithonjeni yomsindo yangaphandle. Nazi ezinye izibonelo zokucushwa kwezitaki eziyisi-6.

Ikuphi ukucushwa kwesitaki sezendlalelo ezingu-6 okungcono kakhulu?

Ukucushwa kwe-stacking oyikhethayo ebhodini elinezingqimba ezi-6 kuzoncika kakhulu kumklamo okudingeka uwuqedele. Uma unamasignali amaningi okufanele ahanjiswe, udinga izendlalelo zesignali ezi-4 zomzila. Ngakolunye uhlangothi, uma kuqala kunikezwa ukulawula ubuqotho besignali yamasekhethi anesivinini esikhulu, inketho ehlinzeka ngokuvikeleka okungcono kakhulu idinga ukukhethwa. Lokhu okunye ukucupha okuhlukile okusetshenziswe kumabhodi anezingqimba ezi-6.

Ukulungiselelwa kokunqwabelanisa kwangempela okwasetshenziswa eminyakeni eminingi edlule kunketho yokuqala yesitaki:

1. Isignali ephakeme kakhulu

2. Isignali yangaphakathi

3. Izinga eliphansi

4. Indiza Yamandla

5. Isignali yangaphakathi

6. Isignali engezansi

Lokhu cishe ukulungiselelwa okubi kakhulu ngoba ungqimba lwesignali alunaso isivikelo, futhi izingqimba ezimbili zesignali azisondelene nendiza. Njengoba ubuqotho besignali kanye nezidingo zokusebenza zibaluleka kakhulu, lokhu kulungiselelwa kuvame ukushiywa. Kodwa-ke, ngokushintsha izendlalelo zesignali ezingaphezulu neziphansi ngezingqimba zomhlabathi, uzophinda uthole isitaki esihle sezendlalelo eziyisi-6. Ububi ukuthi ishiya kuphela izendlalelo ezimbili zangaphakathi zomzila wesignali.

Ukulungiselelwa okuvame ukusetshenziswa kakhulu kwezendlalelo eziyisi-6 ekwakhiweni kwe-PCB ukubeka isendlalelo somzila wesignali yangaphakathi phakathi kwesitaki:

1. Isignali ephakeme kakhulu

2. Izinga eliphansi

3. Isignali yangaphakathi

4. Isignali yangaphakathi

5. Indiza Yamandla

6. Isignali engezansi

Ukucushwa kweplanethi kunikeza isivikelo esingcono sesendlalelo somzila wesignali yangaphakathi, evame ukusetshenziselwa amasiginali aphezulu. Ngokusebenzisa i-dielectric material ewugqinsi ukuze kwandiswe ibanga phakathi kwezingqimba ezimbili zesignali yangaphakathi, lokhu kunqwabelanisa kungathuthukiswa kangcono. Nokho, okubi kwalokhu kucushwa ukuthi ukuhlukaniswa kwendiza yamandla kanye nendiza ephansi kuzonciphisa amandla ayo endiza. Lokhu kuzodinga ukuhlukaniswa okwengeziwe kumklamo.

Isitaki esinezendlalelo eziyisi-6 silungiselelwe ukukhulisa ubuqotho besignali nokusebenza kwe-PCB, okungajwayelekile. Lapha, ungqimba lwesignali luncishisiwe lube izendlalelo ezi-3 ukuze kwengezwe ungqimba olungaphezulu lomhlabathi:

1. Isignali ephakeme kakhulu

2. Izinga eliphansi

3. Isignali yangaphakathi

4. Indiza Yamandla

5. Indiza ephansi

6. Isignali engezansi

Lokhu kunqwabelanisa kubeka ungqimba lwesignali ngayinye eduze kwesendlalelo esingaphansi ukuze uthole izici ezingcono kakhulu zendlela yokubuya. Ukwengeza, ngokwenza indiza yamandla kanye nendiza ephansi eseduze komunye nomunye, i-capacitor yokuhlela ingadalwa. Kodwa-ke, okubi kusewukuthi uzolahlekelwa ungqimba lwesignali yomzila.

Sebenzisa amathuluzi wokuklama we-PCB

Indlela yokudala inqwaba yezendlalelo kuzoba nomthelela omkhulu empumelelweni yomklamo we-PCB enezingqimba ezi-6. Nokho, amathuluzi edizayini ye-PCB yanamuhla angakwazi ukwengeza futhi asuse izendlalelo ekwakhiweni ukuze kukhethwe noma yikuphi ukucushwa kwesendlalelo okufaneleka kakhulu. Ingxenye ebalulekile ukukhetha isistimu yokuklama ye-PCB enikeza ukuguquguquka okuphezulu kanye nokusetshenziswa kwamandla ukuze kube lula ukuklama ukuze udale uhlobo lwesitaki olunezendlalelo ezingu-6.