Use/characteristics of PCB materials and matters needing attention

Lero PCB gawo lapansi limapangidwa ndi Cooper Foil, Reinforcement, resin ndi zinthu zina zitatu zikuluzikulu, koma kuyambira pomwe Lead Free idayamba, ufa wachinayi wazodzaza wawonjezeredwa pamtundu wa PCB. Kupititsa patsogolo kutentha kwa PCB.

Titha kuganiza za zojambulazo zamkuwa monga mitsempha yamagazi yamthupi la munthu, yomwe imagwiritsidwa ntchito kunyamula magazi ofunikira, kuti PCB izitha kusewera; Kulimbitsa kumatha kuyerekezedwa ngati mafupa amunthu, omwe amagwiritsidwa ntchito kuthandizira ndikulimbitsa PCB sikugwa; Utali, komano, ukhoza kuganiziridwa ngati minofu ya thupi la munthu, gawo lalikulu la PCB.

Ntchito, mawonekedwe ndi zinthu zomwe zimafunikira chidwi pazinthu zinayi za PCB zafotokozedwa pansipa:

1. Zojambula Zamkuwa

Dera lamagetsi: Dera loyendetsa magetsi.

Mzere wazizindikiro: nambala yomwe imatumiza uthenga.

Vcc: magetsi, magetsi. Mphamvu yamagetsi yazogulitsa zoyambirira zamagetsi idakhazikitsidwa ngati 12V. Ndi kusintha kwa ukadaulo komanso kufunika kosunga magetsi, magetsi ogwira ntchito pang’onopang’ono adakhala 5V ndi 3V, ndipo tsopano ikupita pang’onopang’ono ku 1V, ndipo chofunikira cha zojambulazo zamkuwa chikukulirakulira.

GND (Grounding) : Grounding ground. Vcc itha kuganiziridwa ngati nsanja yamadzi mnyumba, tikatsegula mpopi, kudzera pamagetsi (magwiridwe antchito) madzi (zamagetsi) amatuluka, chifukwa magwiridwe antchito amagetsi amatsimikiziridwa ndi mayendedwe amagetsi; GND ndi kukhetsa. Madzi onse omwe amagwiritsidwa ntchito kapena osagwiritsidwa ntchito amapita pompopompo. Kupanda kutero wapampopi akadapitirizabe kuda ndipo nyumba yanu ikasefukira.

Kutha kwa Kutentha (chifukwa cha Kutentha Kwakukulu Kwambiri): Kutaya Kutentha. Kodi mudamvapo za CPU ina yotentha kuwira mazira, izi sizokokomeza, zida zambiri zamagetsi zimawononga mphamvu ndikupanga kutentha, panthawiyi zikufunika kupanga gawo lalikulu lazithunzi zamkuwa kuti zizitulutsa kutentha mlengalenga posachedwa kuthekera, apo ayi sianthu okha omwe sangapirire, ngakhale zida zamagetsi zimatsatiranso makinawo.

Kulimbitsa.

Posankha zakuthupi za PCB, ziyenera kukhala ndi izi: Zambiri mwazinthu zopangira PCB zomwe timawona zimapangidwa ndi GF (Glass Fiber). Ngati mungayang’ane mosamala, zinthu za Glass Fiber zili ngati chingwe chowonda kwambiri. Chifukwa cha maubwino otsatirawa, amagwiritsidwa ntchito ngati zinthu zofunikira pa PCB.

Kuuma Kwakukulu: Zimapangitsa PCB kukhala yosavuta kupunduka.

Kukula Kokhazikika: Kukhazikika Kwabwino.

Low CTE: imapereka Low “kutentha kwamphamvu” kuti muchepetse olumikizana ndi dera mkati mwa PCB kuti isalumikizidwe ndikupangitsa kulephera.

Low Warpage: ndi mapindikidwe Low, ndiye kuti, Low mbale kupinda, mbale warping.

Ma Module Akulu: Modulus ya High Young

3. Resin masanjidwewo

Traditional FR4 boards are epoxy-dominated, LF (Lead Free)/HF (Halogen Free) boards are made of a variety of resins and different curing agents, making the cost of LF about 20%, HF about 45%.

HF mbale ndi yosavuta mng’alu ndi kuwonjezera mayamwidwe madzi, wandiweyani ndi lalikulu mbale sachedwa CAF, m’pofunika kugwiritsa ntchito nsalu CHIKWANGWANI lotseguka, nsalu mosabisa CHIKWANGWANI, ndi kulimbikitsa zinthu munali yunifolomu kumiza.

Masamba abwino ayenera kukhala ndi izi:

Kukaniza Kwabwino Kutentha. Kutentha kuwotcherera kawiri kapena katatu mbaleyo itaphulika, ndikutentha kukana.

Kutsitsa Madzi Ochepera: Kutengera Madzi Ochepa. Kuyamwa kwamadzi ndiye komwe kumayambitsa kuphulika kwa board ya PCB.

Kubwezeretsa Lawi: Iyenera Kutayidwa ndi Lawi.

Mphamvu Peel: Ndi “Misozi Mphamvu” yapamwamba.

Mkulu Tg: Malo osinthira magalasi apamwamba. Zambiri mwazida zomwe zili ndi Tg yayikulu sizophweka kuyamwa madzi, ndipo chifukwa chachikulu chosaphulitsira bolodi sikutengera madzi, m’malo mokhala Tg.

Mudati Kulimba ndikwabwino. Kukula kwakulimba kumachepetsa kuphulika. Kulimba kwa mbaleyo kumatchedwa “mphamvu yophulika,” ndipo ndikofunika kuti zinthuzo zikhale bwino, ndizotheka kulimbana ndi kuwonongeka ndi kuwonongeka.

Katundu wa dielectric: Katundu wopangira ma dielectric, mwachitsanzo, zotetezera zinthu.

4. Zosefera System (ufa, pongotayira)

Kumayambiriro koyambitsa kutsogolera, kutentha sikunali kokwanira kwambiri, ndipo bolodi loyambirira la PCB linali lopiririka. Popeza kutsogolera-free kuwotcherera, kutentha chinawonjezeka, kotero ufa anawonjezera kuti gulu PCB kuti PCB mwamphamvu kugonjetsedwa ndi kutentha.

Zosefera ziyenera kulumikizidwa poyamba kuti zithandizire kufalikira komanso kusakanikirana.