Anokwikwidza PCB Mugadziri

Kana tembiricha yepamusoro Tg yedunhu bhodhi ichikwira kune imwe dunhu, iyo substrate inoshanduka kubva ku "girazi mamiriro" kuenda ku "rubber state", uye tembiricha panguva ino inonzi tembiricha yegirazi (Tg) yeplate.Mune mamwe mazwi, Tg ndiyo yakanyanya tembiricha (℃) iyo iyo substrate inoramba yakasimba.Kureva kuti, zvakajairwa PCB substrate zvinhu pakupisa kwepamusoro hazvingogadziri kupfava, deformation, kunyunguduka uye zvimwe zviitiko, asi zvakare zvinoratidza kudzikira kwakanyanya kwemakina uye magetsi zvivakwa (Handifunge kuti unoda kuona zvigadzirwa zvavo zvichionekwa nyaya iyi. )

General Tg mahwendefa anopfuura 130 madhigirii, yakakwirira Tg inowanzopfuura 170 madhigirii, uye yepakati Tg inodarika 150 madhigirii.

Kazhinji, Iyo PCB ine Tg≥170℃ inonzi yakakwira Tg redunhu bhodhi.

Iyo Tg ye substrate inowedzera, uye kupisa kwekudzivirira, kusimba kwehunyoro, kupikisa kwemakemikari, kugadzikana kwekudzivirira uye mamwe maitiro ebhodhi redunhu achavandudzwa nekuvandudzwa.Iyo yakakwira iyo TG kukosha ndeye, zvirinani tembiricha yekudzivirira kuita kweplate ichave.Kunyanya mukutungamira-isina maitiro, yakakwira TG inowanzo shandiswa.

High Tg inoreva kupisa kwakanyanya.Nekukurumidza kusimudzira kweindasitiri yemagetsi, kunyanya zvigadzirwa zvemagetsi zvinomiririrwa nemakomputa, kune kusimudzira kwepamusoro basa, yakakwira multilayer, kudiwa kwePCB substrate zvinhu zvakakwirira kupisa kupisa sevimbiso yakakosha.Kubuda nekusimudzirwa kwehunyanzvi hwekuisa tekinoroji inomiririrwa neSMT neCMT kunoita kuti PCB iwedzere kutsamira parutsigiro rwekupisa kwakanyanya kwe substrate maererano nekuvhura kudiki, wiring yakanaka uye nhete mhando.

Naizvozvo, mutsauko uripo pakati peyakajairwa FR-4 uye yakakwirira-TG FR-4 ndeyekuti munzvimbo yekupisa, kunyanya mushure me hygroscopic uye kupisa, iyo mechanical simba, dimensional kugadzikana, kunamatira, kunyura kwemvura, kuora kwekushisa, kuwedzera kwemafuta uye mamwe mamiriro zvinhu zvacho zvakasiyana.High Tg zvigadzirwa zviri pachena zviri nani pane zvakajairwa PCB substrate zvinhu.Mumakore achangopfuura, nhamba yevatengi inoda yakakwirira Tg yedunhu bhodhi yakawedzera gore negore.