FR4 vs. Polyimide: Ndizinthu ziti zomwe zili zoyenera mabwalo osinthika?

Mubulogu iyi, tiwona kusiyana pakati pa FR4 ndi zida za polyimide komanso momwe zimakhudzira kapangidwe kake kakuzungulira komanso magwiridwe antchito.

Ma frequency osinthika, omwe amadziwikanso kuti ma flexible printed circuits (FPC), akhala mbali yofunika kwambiri pamagetsi amakono chifukwa amatha kupindika ndi kupindika. Mabwalowa amagwiritsidwa ntchito kwambiri pazinthu monga mafoni a m'manja, zida zovala, zamagetsi zamagalimoto, ndi zida zamankhwala. Zida zomwe zimagwiritsidwa ntchito popanga makina osinthika zimakhala ndi gawo lofunikira pakuchita kwawo komanso magwiridwe antchito. Zida ziwiri zomwe zimagwiritsidwa ntchito m'mabwalo osinthika ndi FR4 ndi polyimide.

FR4 imayimira Flame Retardant 4 ndipo ndi fiberglass yolimbitsa epoxy laminate. Amagwiritsidwa ntchito kwambiri ngati maziko a matabwa olimba osindikizidwa (PCBs).Komabe, FR4 itha kugwiritsidwanso ntchito m'mabwalo osinthika, ngakhale ndi malire. Ubwino waukulu wa FR4 ndi mphamvu yake yamakina komanso kukhazikika kwake, ndikupangitsa kuti ikhale yoyenera kugwiritsa ntchito komwe kuuma ndikofunikira. Komanso ndi yotsika mtengo poyerekeza ndi zipangizo zina zomwe zimagwiritsidwa ntchito m'mabwalo osinthasintha. FR4 ili ndi zida zabwino kwambiri zotchinjiriza magetsi komanso kukana kutentha kwambiri. Komabe, chifukwa cha kuuma kwake, sikusinthasintha monga zipangizo zina monga polyimide.

Polyimide, kumbali ina, ndi polima wochita bwino kwambiri yemwe amapereka kusinthasintha kwapadera. Ndizinthu za thermoset zomwe zimatha kupirira kutentha kwambiri ndipo ndizoyenera kugwiritsa ntchito zomwe zimafuna kukana kutentha.Polyimide nthawi zambiri imasankhidwa kuti igwiritsidwe ntchito m'mabwalo osinthika chifukwa cha kusinthasintha kwake komanso kulimba kwake. Ikhoza kupindika, kupindika ndi kupindika popanda kusokoneza magwiridwe antchito a dera. Polyimide ilinso ndi zida zabwino zotchinjiriza magetsi komanso kutsika kwa dielectric pafupipafupi, zomwe zimapindulitsa pakugwiritsa ntchito pafupipafupi. Komabe, polyimide nthawi zambiri imakhala yokwera mtengo kuposa FR4 ndipo mphamvu yake yamakina imatha kukhala yotsika poyerekeza.

Onse FR4 ndi polyimide ali ndi zabwino ndi zofooka zawo zikafika pakupanga.FR4 nthawi zambiri imapangidwa pogwiritsa ntchito njira yochepetsera pomwe mkuwa wopitilira muyeso umakhazikika kuti upangire dongosolo lomwe mukufuna. Njirayi ndi yokhwima ndipo imagwiritsidwa ntchito kwambiri pamakampani a PCB. Komano polyimide, nthawi zambiri amapangidwa pogwiritsa ntchito njira yowonjezera, yomwe imaphatikizapo kuyika zigawo zopyapyala zamkuwa pagawo laling'ono kuti apange mawonekedwe ozungulira. Njirayi imathandizira kuti ma conductor azitha kuyang'ana bwino komanso kuti azikhala motalikirana kwambiri, zomwe zimapangitsa kuti zikhale zoyenera pamayendedwe osunthika kwambiri.

Pankhani ya magwiridwe antchito, kusankha pakati pa FR4 ndi polyimide kumatengera zofunikira pakugwiritsa ntchito.FR4 ndi yabwino kwa mapulogalamu omwe kulimba ndi mphamvu zamakina ndizofunikira, monga zamagetsi zamagalimoto. Ili ndi kukhazikika kwabwino kwa kutentha ndipo imatha kupirira kutentha kwambiri. Komabe, kusinthasintha kwake kochepa sikungakhale koyenera kwa mapulogalamu omwe amafunikira kupindika kapena kupindika, monga zida zovala. Polyimide, kumbali ina, imapambana pamapulogalamu omwe amafunikira kusinthasintha komanso kulimba. Kutha kupirira kupindika mobwerezabwereza kumapangitsa kuti ikhale yabwino pamapulogalamu oyenda mosalekeza kapena kugwedezeka, monga zida zamankhwala ndi zamagetsi zammlengalenga.

Powombetsa mkota, Kusankhidwa kwa FR4 ndi zida za polyimide m'mabwalo osinthika zimatengera zofunikira pakugwiritsa ntchito.FR4 ili ndi mphamvu zamakina apamwamba komanso kukhazikika, koma kusinthasintha kochepa. Polyimide, kumbali ina, imapereka kusinthasintha kwapamwamba komanso kulimba koma ikhoza kukhala yokwera mtengo. Kumvetsetsa kusiyana pakati pa zidazi ndikofunikira pakupanga ndi kupanga mabwalo osinthika omwe amakwaniritsa magwiridwe antchito ndi magwiridwe antchito. Kaya ndi foni yam'manja, yovala kapena yachipatala, kusankha zida zoyenera ndikofunikira kuti mabwalo azitha kuyenda bwino.