Liphetoho tsa mocheso o sebetsang li ka ba le tšusumetso e kholo ts'ebetsong, ho tšepahala, bophelo bohle le boleng ba lihlahisoa. Mocheso o nyoloha o fella ka hore thepa e atolohe, leha ho le joalo, lisebelisoa tsa substrate tseo PCB li entsoeng ka tsona li na le li-coefficients tse fapaneng tsa ho atolosa mocheso, sena se baka khatello ea mochine e ka bakang mapetsong a manyenyane a ka 'nang a se ke a bonoa nakong ea liteko tsa motlakase tse etsoang qetellong ea tlhahiso.
Ka lebaka la leano la RoHS le fanoeng ka 2002 ho ne ho hlokahala li-alloys tse se nang loto bakeng sa soldering. Leha ho le joalo, ho tlosa loto ka ho toba ho fella ka ho phahama ha mocheso o qhibilihisang, liboto tsa potoloho tse hatisitsoeng li tlas'a mocheso o phahameng nakong ea soldering (ho kenyeletsoa reflow le wave). Ho ipapisitse le mokhoa o khethiloeng oa ho khutlisa (e le 'ngoe, habeli…), hoa hlokahala ho sebelisa PCB e nang le litšobotsi tse nepahetseng tsa mochini, haholo e nang le Tg e loketseng.
Tg ke eng?
Tg (mocheso oa mocheso oa khalase) ke boleng ba mocheso bo tiisang botsitso ba mochine oa PCB nakong ea ts'ebetso ea ts'ebetso ea PCB, e bua ka mocheso o boima oo substrate e qhibilihang ho tloha ho tiileng ho ea ho metsi a rubberized, re bitsitse Tg point, kapa ntlha ea ho qhibiliha hore e utloisisehe habonolo. E phahameng Tg ntlha ke, e phahameng mocheso tlhokahalo ea boto e tla ba ha laminated, le phahameng Tg boto ka mor'a laminated tla boela ho be thata le brittle, e leng melemo bakeng sa tshebetso e latelang tse kang ho cheka mechine (haeba ho le joalo) le ho boloka thepa ea motlakase e molemo nakong ea tšebeliso.
Mocheso oa phetoho ea khalase ho thata ho lekanyetsoa ka nepo ka ho nahanela lintlha tse ngata, hammoho le thepa e 'ngoe le e' ngoe e na le sebopeho sa eona sa molek'hule, ka hona, lisebelisoa tse fapaneng li na le mocheso o fapaneng oa phetoho ea khalase, 'me lisebelisoa tse peli tse fapaneng li ka ba le boleng bo tšoanang ba Tg leha li na le litšobotsi tse fapaneng, sena se re nolofalletsa ho ba le khetho e 'ngoe ha thepa e hlokahalang e felile.
Likarolo tsa lisebelisoa tse phahameng tsa Tg
l Botsitso bo botle ba mocheso
l Ho hanyetsa hantle mongobo
l Coefficient e tlase ea katoloso ea mocheso
l Ho hanyetsa lik'hemik'hale ho feta thepa e tlaase ea Tg
l Boleng bo phahameng ba ho hanyetsa khatello ea kelello ea mocheso
l Botshepehi bo babatsehang
Melemo ea High Tg PCB
Ka kakaretso, PCB e tloaelehileng ea FR4-Tg ke likhato tse 130-140, Tg e bohareng e kholo ho feta likhato tse 150-160, 'me Tg e phahameng e kholo ho feta likhato tse 170, High FR4-Tg e tla ba le ho hanyetsa mocheso le lik'hemik'hale ho feta FR4 e tloaelehileng, mona ke melemo e meng ea Tg PCB e phahameng bakeng sa tlhahlobo ea hau:
1. Botsitso bo phahameng: E tla ntlafatsa ka bo eona ho hanyetsa mocheso, ho hanyetsa lik'hemik'hale, ho hanyetsa mongobo, hammoho le botsitso ba sesebelisoa haeba ho eketsa Tg ea substrate ea PCB.
2. Mamella moralo o phahameng oa matla a matla: Haeba sesebelisoa se na le matla a phahameng a matla le boleng bo phahameng ba calorific, joale Tg PCB e phahameng e tla ba tharollo e ntle bakeng sa taolo ea mocheso.
3. Liboto tse kholo tse hatisitsoeng tsa potoloho li ka sebelisoa ho fetola moralo le litlhoko tsa matla tsa lisebelisoa ha li ntse li fokotsa ho hlahisa mocheso oa liboto tse tloaelehileng, 'me Tg PCBS e phahameng e ka boela ea sebelisoa.
4. Khetho e nepahetseng ea li-multi-layer le HDI PCB: Hobane li-multi-layer le HDI PCB li kopane haholoanyane le potoloho e teteaneng, e tla fella ka boemo bo phahameng ba mocheso oa mocheso. Ka hona, li-PCB tse phahameng tsa TG li sebelisoa hangata ho li-PCB tse ngata le tsa HDI ho netefatsa ho ts'epahala ha tlhahiso ea PCB.
U hloka High Tg PCB neng?
Ka tloaelo ho netefatsa ts'ebetso e ntle ka ho fetisisa ea PCB, mocheso o phahameng oa ho sebetsa oa boto ea potoloho e lokela ho ba likhato tse ka bang 20 ho feta mocheso oa phetoho ea khalase. Ka mohlala, haeba boleng ba Tg ba thepa e le likhato tse 150, joale mocheso oa sebele oa ho sebetsa oa boto ena ea potoloho ha oa lokela ho feta likhato tse 130. Joale, u hloka Tg PCB e phahameng neng?
1. Haeba kopo ea hau ea ho qetela e hloka ho jara mojaro oa mocheso o moholo ho feta likhato tse 25 tsa centigrade ka tlase ho Tg, joale Tg PCB e phahameng ke khetho e ntle ka ho fetisisa bakeng sa litlhoko tsa hau.
2. Ho etsa bonnete ba polokeho ha lihlahisoa tsa hau li hloka mocheso o sebetsang o lekanang kapa o moholo ho feta likhato tse 130, Tg PCB e phahameng e ntle bakeng sa kopo ea hau.
3. Haeba ts'ebeliso ea hau e hloka PCB ea mekhahlelo e mengata ho fihlela litlhoko tsa hau, thepa e phahameng ea Tg e ntle bakeng sa PCB.
Lisebelisoa tse hlokang Tg PCB e phahameng
l Gateway
l Inverter
l Antenna
l Wifi Booster
l Embedded Systems Development
l Sistimi ea Khomphutha e kentsoeng
l Lisebelisoa tsa Matla a Ac
l Sesebelisoa sa RF
l Indasteri ea LED
Best Tech e na le boiphihlelo bo botle ba ho etsa High Tg PCB, re ka etsa li-PCB ho tloha Tg170 ho isa ho Tg260 e phahameng, hajoale, haeba kopo ea hau e hloka ho sebelisa mocheso o phahameng haholo joalo ka 800C, o ka sebelisa hamolemo.Boto ea Ceramic e ka fetang -55 ~ 880C.