Ufanele ukhethe njani Izinto PCB

Izinto ezisetyenziselwa ukuvelisa iibhodi zesekethe eziprintiweyo (i-PCBS) zibandakanya iqela le-insulating / dielectric kunye nezinto zokuhambisa ezisetyenziselwa ukwakha uqhagamshelo lwebhodi yesekethe. Iintlobo ngeentlobo zemathiriyeli ziyafumaneka ukuhlangabezana neemfuno zomsebenzi ezahlukeneyo kunye nohlahlo-lwabiwo mali. Uhlobo lwezinto ezisetyenzisiweyo ukwenza iPCBS yinto ephambili kuzinzo kunye nokusebenza kwezinto zePCB. Ukukhetha imathiriyeli ye-PCB elungileyo kufuna ukuqonda kwezinto ezikhoyo kunye neempawu zazo ezibonakalayo, kunye nendlela ezihambelana ngayo nomsebenzi oyifunayo webhodi.

Uhlobo lwebhodi yesekethe eprintiweyo

Kukho iindidi ezi-4 eziphambili zePCBS:

L Ngqongqo-eqinileyo, engakhubazeki enye-okanye iPBB yamacala amabini

I-Flexible (Flex) -isoloko isetyenziswa xa i-PCB ingenakuvalelwa kwinqwelomoya enye okanye kwindawo engekho moya

L Ngqongqo-bhetyebhetye – yindibaniselwano ye-PCB engqongqo eguqukayo, apho ibhodi eguqukayo idityaniswe kwibhodi engqongqo

L Ukuhamba rhoqo-Ezi PCBS zihlala zisetyenziswa kwizicelo ezifuna ukuhanjiswa komqondiso okhethekileyo phakathi kwethagethi kunye nomamkeli.

Izinto zePCB ezikhethiweyo ziyafuneka ukulungiselela ukwenziwa kokugqibela kwendibano yebhodi yesekethe eprintiweyo. Ke ngoko, kubalulekile ukuqaphela ukusebenza kunye neemfuno zokusingqongileyo kumacandelo esekethe.

Iimpawu ezibonakalayo ukuba ziqwalaselwe xa ukhetha izinto zePCB

Iimpawu ezine eziPhambili (ukusuka kwi-IPC 4101 -Ukuqina kunye neMultilayer PCB Isiseko seMpahla yeeNkcukacha) Uhlobo lwezinto zePCB lubalulekile ukunceda ukucacisa ukusebenza kwezinto ezisisiseko.

1. I-CTE-Ukwanda okwandisiweyo kwe-Thermal ngumlinganiso wokuba izinto ziyanda kangakanani xa kushushu. Oku kubaluleke kakhulu kwi-Z-axis. Ngokubanzi, ukwanda kukhulu kuneqondo lobushushu lokubola (Tg). Ukuba i-CTE yezinto eziphathekayo ayonelanga okanye iphezulu kakhulu, ukusilela kunokwenzeka ngexesha lendibano kuba imathiriyeli iya kwanda ngokukhawuleza ngaphezulu kwe-Tg.

I-Tg -Iqondo lobushushu lotshintsho lwezinto ezibonakalayo bubushushu apho izinto ziguquka ukusuka kwizinto eziqinileyo zeglasi ziye kwinto erabha eguqukayo ngakumbi. Kumaqondo obushushu aphezulu kunezinto ze-Tg, izinga lokwanda liyanda. Gcina ukhumbula ukuba izinto ezinokubakho zinokuba ne-Tg efanayo kodwa zinee-CTE ezahlukeneyo. (I-CTE esezantsi iyanqweneleka).

3.Td -ukubola kobushushu be-laminates. Eli liqondo lobushushu apho izinto ziphuka khona. Ukunyaniseka kuphazamisekile kwaye i-delamination inokwenzeka njengoko izinto zikhupha ukuya kuthi ga kwi-5% yesisindo sayo santlandlolo. I-PCB enokuthenjwa okuphezulu okanye i-PCB esebenza phantsi kweemeko ezinzima iya kufuna i-TD enkulu okanye ilingane ne-340 ° C.

Ixesha leDelamin kwi-T4 / T260 – 288 ° C kunye ne-260 ° C -Ukungqinelana kokungamanyani kwe-laminates ngenxa yokubola kwe-thermal (Td) ye-epoxy resin matrix xa ubukhulu be-PCB butshintshiwe.

Ukukhetha eyona nto ilaminate yePCB yakho, kubalulekile ukuba wazi ukuba ulindele ukuba izinto ziziphathe njani. Enye yeenjongo zokhetho lwezixhobo kukulungelelanisa iipropathi ezishushu zento elaminethiweyo ngokusondeleyo kunye nezinto ekufuneka zidityaniswe kwipleyiti.