Iyi ngingo ikubiyemo uburyo bwo guhuza umuvuduko wumurongo wumurongo hamwe nuburebure bwa furu kugirango hamenyekane ko imiti ya organosilicone igera kurwego rwo gukiza kurwego rwo hejuru rwa PTFE. Ihame ryibanze rihuye: igihe cyose cyo gutura t_total = uburebure bwa furu burebure L ÷ umurongo umuvuduko v ugomba kuba munsi yigihe gito gisabwa cyo gukira. Shakisha imiti ikiza ukoresheje DSC cyangwa ibizamini byo gukiza byerekana 'ubushyuhe - igihe gito cyo gukiza ' umubano. Icyitegererezo cyo gukiza kimwe: kugabanya ifuru muri zone, kubara ti = Li / v na tcure (Ti), menya ∑ (ti / tcure (Ti)) ≥1. Uburyo bwo kubara: shiraho ubushyuhe bwuburebure bwa Li n'ubushyuhe Ti; shiraho umurongo wihuta v, ubare buri zone igihe cyo gutura nigipimo cyintererano; gusubiramo kugeza byose hamwe ≥1 (margin umutekano 1.1-1.2 bisabwa).

Iyi ngingo igereranya itandukaniro riri hagati yo gushyushya imirasire yimirasire nuburyo bwo gushyushya umuyaga ushushe uburyo bwo gukiza uburyo bwo guhuza imiterere ihuza imiterere ya silicone. Uburyo bwo guhererekanya ubushyuhe: ikirere gishyushye gishingiye kuri convection-itwarwa nubushyuhe bworoheje bwiyongera, itandukaniro rito ryimbere / hanze; IR ifite ubujyakuzimu bwimbitse hamwe no kwinjiza cyane (micrometero mirongo kugeza ku magana) bikora hejuru cyane-imbere-imbere. Ingaruka ku guhuza kwambukiranya: umwuka-ushyushye utuma gukira gukira imbere no hanze hamwe n'ubucucike bumwe; IR itera urwego rwo hejuru gukora byihuse 'firime yuruhu ' ibuza gutwara ubushyuhe no kugenda kwimbere imbere, bigatuma ubucucike bwambukiranya bugabanuka kuva hejuru kugeza imbere.

Iyi ngingo ikubiyemo kwandikirana kwinshi hagati yagace ka gel nimbaraga zifatika mumashanyarazi ya silicone yunvikana kuri kaseti ya Teflon. Igice cya Gel = ijanisha ryinshi ryurusobekerane rwumuyoboro udashobora gukemuka muri toluene (Gukuramo Soxhlet, 24hr). Imbaraga zifatika zirangwa nubushyuhe bwo hejuru bwo gufata (180 ° C, 1kg). Imirongo itatu: munsi yingingo zikomeye (<60%) - nta rezo ya percolating, ifata imbaraga hafi ya zeru; urwego rufatika (60-85%) - imbaraga zifatika zikura cyane hamwe nigice cya gel, 60% → 70% izamura ifata umwanya kuva muminota kugeza kumasaha, 70% → 80% itanga 3-10x kwiyongera; guhuza cyane (> 85%) - yunguka gahoro (85% → 95% kwiyongera 20-50% gusa), tack yagabanutse cyane,> 95% itakaza imitungo ya PSA.

Iyi ngingo ikubiyemo uburyo bwo guhuza ubushyuhe bwangirika hamwe nubuzima bwa kimwe cya kabiri cya peroxide ihuza ibintu (BPO na DCP) hamwe nidirishya ryo gukiza kaseti ya Teflon. Amakuru yibanze: BPO - 1-min igice cyubuzima kuri ~ 131 ° C, 1-isaha kuri ~ 92 ° C, 10-isaha kuri ~ 72 ° C; DCP - 1-min kuri ~ 171 ° C, 1-isaha kuri ~ 135 ° C, 10-isaha kuri ~ 115 ° C. Guhuza logique: gufatira gukenera 97-99% guhuza = 5-7 igice cyubuzima; gukiza igihe = 5-7 × igice cyubuzima ku bushyuhe bwintego. Inyuma-kubara ubushyuhe uhereye kumurongo wo guturamo igihe cyangwa kugaruka-kubara igihe uhereye kubushyuhe bwemewe.

Iyi ngingo igereranya itandukaniro riri hagati yubushyuhe bwimirasire yubushyuhe hamwe nubushyuhe bwumuyaga ushyushye kumiterere ihuza imiterere ya silicone yometse kumurongo. Uburyo bwo guhererekanya ubushyuhe: umuyaga ushyushye ni convection-itwara, yoroheje kandi itera imbere, ikora ubushyuhe buringaniye; IR ni imishwarara-yinjiza hamwe nubutaka bukabije (micrometero kugeza kuri milimetero) bikora hejuru cyane-imbere-imbere. Ingaruka ku gukwirakwiza ubucucike: umuyaga ushyushye utuma ibice by'imbere n'inyuma byinjira mu bushyuhe bw’ibirunga hafi icyarimwe, bigatanga ubucucike bumwe bwimbitse; IR itera urwego rwo hejuru gukira ako kanya rukora uruhu rwinshi rubuza ihererekanyabubasha, bikavamo gradient ikaze yubucucike bwa crosslink igabanuka kuva imbere imbere.

Iyi ngingo irasuzuma ingaruka zo kugenzura imbogamizi zurubuga mugihe cya Teflon yubushyuhe bwo hejuru bwa kaseti kuri PTFE substrate igororotse hamwe no gufatira hamwe. Ingaruka ku buringanire bwa substrate: impagarara zirenze urugero rwa elastique zitera kurambura plastike idasubirwaho kurambura no kwizosi (kurambura birebire, kugabanuka kwambukiranya), gukora ubunebwe, iminkanyari hamwe nuburyo bwo kuzunguruka; PTFE kunyerera munsi yubusa burahinduka 'gukonjeshwa ' nyuma yo gukonja, bigatera ubusumbane bwubuso; impagarike itaringaniye iturutse kumukino muke ugereranije ikora impande zigoramye, guhuha hagati, hamwe nibimenyetso bifatika.

Iyi ngingo isobanura uburyo bwo guhinduka mumbaraga zifatika za PTFE ubushyuhe bwo hejuru bwa kaseti ifata nyuma yubusaza bukabije. Inzira y'ibyiciro bitatu: Nyuma yo gukira izamuka ryicyiciro (ubushyuhe bwo hejuru bwo hejuru yubushyuhe bwo hejuru kuri 200-260 ° C, amatsinda asigaye akomeza guhuzagurika, ubumwe bwiyongera cyane); Icyiciro gihwanye neza (guhuza inzira yegereje kurangira, guhuriza hamwe biguma bihamye mugihe kirekire); Gutesha agaciro no kugabanuka (igihe kirenze / ubushyuhe butera urunigi nyamukuru kwangirika, guhuzagurika kugabanuka, gufatira byoroshye no guhinduka). Hasesenguwe imizi itera kunanirwa gufatana hamwe (gutanyagura imbere gusiga ibisigara) no gusohoka (gutembera gukonje kuva kumpande kubera kugabanuka kwa modulus).

Iyi ngingo irerekana uburyo bwo kunoza imirwanyasuri hamwe nigihe kirekire cyo gutuza kwa Teflon ifite ubushyuhe bwinshi. Ingamba zirimo: Molecular net topologiya optimizasiyo - MQ silicone yo hejuru ya resin / gum igereranyo (1.2: 1-2-2: 1) ikora ibyiciro bikomeye bigoye; kwinjiza amatsinda ya fenyl (20-30 mol%) bibuza urunigi; uburemere bwa molekuline igenzurwa kuri 5.000-15,000 g / mol; Gradient modulus multilayer adhesive structure - primer-anchoring layer (1-3μm) hamwe na silane ihuza silane, urwego rwo hejuru-modulus cohesive layer (30-50μm) nka skeleton idashobora kwangirika, skelet ikora ya viscoelastic (3-8μm) kugirango itose hejuru; Nanofillers - silika yumye (10-25 wt%) hamwe no guhindura isura itera guhuza umubiri guhinduka.

Iyi ngingo irerekana uburyo imiterere ya microporome igishushanyo cya Teflon ihumeka (PTFE) yerekana ubushyuhe bwo hejuru buringaniza ikirere hamwe nubwishingizi hamwe nibidafite inkoni. Amakimbirane yibanze: umwuka wogusaba bisaba imyenge ifunguye, mugihe insulasiyo isaba ubucucike naho kutaba inkoni bisaba ubuso bworoshye. Ingamba zishushanyije: kugenzura impuzandengo ya pore (0.1-2μm, nibyiza <0.5μm) kugirango wirinde gushonga no gukomeza voltage yameneka; kugenzura ububobere kuri 50-70% (≈60% optimal) kugera kuri Gurley 20-100s / 100cc nimbaraga za dielectric ≥2kV kuri firime 0.13mm; fata imiyoboro ihanitse ya 3D imiyoboro ya pore (τ≈2.5-4) kugirango uhagarike imiyoboro inyuramo; kubaka imiterere ya asimmetric gradient pore hamwe nurwego rwuruhu rwinshi rwuruhu (1-5 mm) kubutari inkoni / insulasiyo hamwe nimbere imbere kugirango ihumeke; koresha super-oleophobic / hydrophobic hejuru yubutaka nyuma yo kuvurwa nta pore ifunze.

Iyi ngingo itanga ibisubizo bya sisitemu yo gukumira ibisigazwa bifata hamwe no kuva amaraso yumuti mugihe ukoresheje kaseti ya PTFE yubushyuhe bwo hejuru kugirango urinde intoki za zahabu PCB mugihe cyo guterana kwa SMT. Isesengura ry'imizi: ibisigara bibaho biturutse ku kunanirwa gufatanya cyangwa kwimura intera; kuva amaraso bibaho biturutse ku kugabanuka kwijimye no gufatira hejuru yubushyuhe. Igisubizo cyibanze ni uguhitamo kaseti ikwiye: silicone PSA ifite impinga yigihe gito ≥300 ° C, ikomeza ≥260 ° C, uburebure bwuzuye 0.08-0.13mm hamwe nuduce twinshi twa cohesion yometseho, hamwe nicyemezo cyo kurwanya amaraso / ibisigisigi. Igenzura ryintambwe esheshatu: gusukura mbere ya lamination hamwe na IPA; zero-tension lamination hamwe no guhumeka ikirere cyuzuye; uburyo bwiza bwo kwerekana ubushyuhe hamwe n'ubushyuhe bworoheje (<2 ° C / s); gukonjesha gukonje munsi ya 50 ° C kuri 180 °; guhita gutunganya mumasaha 24 no gukoresha rimwe gusa; kunanirwa gukemura hamwe no guhanagura IPA no kugenzura magnifier 40-50x. Kubice bibiri PCBs, usimbuze kaseti nshya mbere yo gutunganya uruhande rwa kabiri.