Itheyiphu ye-PTFE yokushisa okuphezulu isebenza njengento ebalulekile ekwenziweni kwe-semiconductor, hhayi into evamile esebenzisekayo. Izinhlelo zokusebenza ezibalulekile: ukuvikelwa kweleveli ye-wafer (i-plasma etching masking, ukuvikelwa kwe-CMP ngemuva, ukufihla i-CVD/PVD), izinqubo zokupakisha (ukulungiswa kwe-wire bonding, imaski e-soldering yama-PCB), nokugcinwa kwemishini (i-anti-static roller wrapping, ukumakwa kwegumbi lokuhlanza). Izidingo ezihlanzeke kakhulu: ama-halogen aphansi (avimbela ukugqwala kwephedi yebhondi), ama-siloxane aphansi (<500 ppm, avimbela ukwakheka kwezinhlayiyana ezivikelayo), ama-ion ensimbi aphansi (<1 ppm ngayinye), ukuhlukaniswa/ukupakisha kwegumbi le-ISO Class 4, 10⁶-10⁹ Ω ukumelana ne-TV ebusweni obuphansi, nokumelana ne-TV okuphansi.

Ukuhlanzeka kwempahla eluhlaza kuyisisekelo esiyisisekelo sekhwalithi yendwangu yezinga lokushisa eliphezulu ye-PTFE. Ukungcola (iziqalisi eziyinsalela, izinto ezisetshenziswayo, ama-ion ensimbi, ama-sizing agents angcolile) kubangela ukuwohloka kokushisa ngaphambi kwesikhathi (amabhamuza, amabhamuza angaphezu kuka-260°C), izindawo ezingabambeki ezingalingani (amaphoyinti okunamathela), ukuncishiswa kokufakwa kukagesi (ukulahleka kwe-dielectric, ukwehla kwamandla kagesi), ukuwohloka kokushisa okuphansi (kanye nombala ophuzi wokuqhekeka), ukuqina kombala ophuzi Izinto zokusetshenziswa ezimsulwa eziphezulu ziqinisekisa ukuthobela kwe-FDA, impilo ende, indwangu ye-PTFE esebenza kakhulu.

I-PTFE-coated fiberglass sintering yendwangu idinga isikhathi esinembile sokubamba ku-370-400°C. Izithando zomlilo eziqhubekayo: 30-90s (zacile) ukuya ku-3-5+ amaminithi (aminyene). Izithando zenqwaba: 5-15 min. I-under-sintering idala i-opaque, izimbotshana ezimahhadlahhadla; i-sintering ngokweqile idala ukuphuzi, ukonakala, nokukhishwa kwegesi ye-fluoride enobuthi. Ukulungiselela inqubo: sebenzisa izilandeleli zezinga lokushisa esithandweni, yenza ukuhlola okubonakalayo (okungafihli lutho, okuguquguqukayo), futhi wenze ukuhlola ukudonsa kwetheyiphu. Njalo qinisekisa ukufana kwezinga lokushisa eliwugqinsi olugcwele.

Itheyiphu yokushisa ephezulu ye-PTFE yezinga lezokwelapha ihlanganisa i-biocompatible PTFE substrate ne-adhesive abicah elashwe ngeplatinamu. Izici ezibalulekile: I-ISO 10993 iyahambisana (ayikho i-cytotoxicity, ukuzwela, noma ukucasuka), imelana nokuvala inzalo okuphindaphindiwe (umusi/EO/gamma), ukumelana nokushisa okungu-260°C. Izinyathelo zokuqapha ezibucayi: ungeqi ku-260°C (intuthu enobuthi engaphezu kuka-300°C), i-gamma irradiation ingase ibangele i-embrittlement, iqinisekise izindlela zokuvala inzalo, futhi icele imibhalo yokuthobela ngokugcwele (imibiko ye-ISO 10993, i-MSDS, idatha yokuguga). Hhayi okwegazi eliqondile noma ukusetshenziswa kokufakelwa ngaphandle kokuthi kuqinisekiswe ngokuqondile.

Indwangu ye-PTFE enezinga eliphezulu lokushisa idinga ukuphathwa ngokucophelela ukuze kuqinisekiswe ukuphepha nokuphila isikhathi eside. Izinyathelo zokuqapha eziyinhloko: ungalokothi udlule u-260°C (ngaphezulu kuka-320°C ukhipha intuthu enobuthi), gwema ama-crease abukhali (ama-cracks ambozwe, aveze i-fiberglass), akukho ukuhlanzwa okulimazayo (uboya bensimbi bulimaza indawo enganamathi), gcina imvume yokunwetshwa okushisayo (ivimbela ukudabuka), futhi ufake esikhundleni lapho kubhamuza noma kuhlutshiwe. Isitolo sigoqiwe, kude ne-UV. Gqoka amagilavu ​​avikela ukushisa ngesikhathi sokuphatha.

Indwangu ye-PTFE enezinga eliphezulu lokushisa ine-coefficient of thermal expansion (CTE) engu-30-60 ppm/°C (i-warp/weft) – ephakeme kune-fiberglass iyodwa kodwa iphansi kakhulu kune-PTFE emsulwa (100-200 ppm/°C). I-PTFE ibhekana nokushintsha kwevolumu okungazelelwe (1-2%) ku-19°C no-30°C noshintsho lwesigaba. Ukuze ugweme ukugoqa, ukuklebhuka, kanye ne-delamination: imvume yedizayini yokunwetshwa kwamahhala, gwema ukushuba ngokusebenzisa amazinga okushisa okushintsha kwesigaba, sebenzisa ama-tensioner azenzakalelayo kumabhande okuthutha, futhi sebenzisa idizayini yokugqagqana emelene nokubhibha. Ukuhlolwa njalo kokugeleza okubandayo kubalulekile.

Ukusebenziseka kabusha kwetheyiphu ye-PTFE kuncike ezicini ezine: ukwakheka kokunamathelayo (ukuminyana okuphezulu kwe-crosslink, ukufuduka kwe-silicone ephansi, isakhiwo se-microphase se-tack ekwazi ukubekeka kabusha), i-substrate anchoring (ukwenza kusebenze kobuso + i-primer ukuvimbela ukudluliswa okunamathelayo okugcwele), ukunamathela okungemuva (ukukhulula ungqimba ukuze kuvikelwe okunamathelayo ngesikhathi sokuqaqa), nokuphatha okufanele (indlela yokunamathisela ecwebileyo, indawo yokunamathisela ecwebileyo, ukugwema okulungile). Izinamatheliso eziguquliwe eziwasheka ngamanzi zingalulama > 90% itheki ngemuva kokuhlanza.

Omata bokubhaka bendwangu bezinga lokushisa eliphezulu be-PTFE banikeza izinzuzo ezine ezibalulekile: ukusebenza okungeyona induku (akukho mafutha noma ufulawa odingekayo, amakhekhe athambile akhululwa ngokuhlanzekile), izinga lokushisa elibanzi (-70°C kuya ku-260°C, liphephile kuhhavini kuya efrijini), ukusebenziseka kabusha (izinkulungwane zemijikelezo, ukuhlanzeka kalula), ngisho nokuqhutshwa kokushisa (kuvimbela ukushiswa, ukunsundu okulinganiselwe). Ihambisana ne-FDA yebanga lokudla, ikhipha iphepha lesikhumba futhi yenza ama-silicone amacansi ngokudluliswa okungcono kokushisa kanye nokuthungwa kwendawo ecolekile.

Indwangu yokushisa ephezulu ye-PTFE ibalulekile embonini yokuhlanganisa izingubo. Izicelo ezibalulekile: amabhande angapheli angapheli emishini yokuxubha eqhubekayo (avimbela ukunamathela okunamathelayo okuncibilika okushisayo, ukudlulisa okungenayo imibimbi), isembozo esinganamatheli kanye nendwangu yokugoqa yokucindezela ukushisa okuyisicaba (ivikela amapuleti ekungcolisweni okunamathelayo), amabhande okuhambisa amachashazi okunamathisela/okunamathelayo ngesikhathi sokunamathisela kwe-powder ukomisa/ukucwilisa), kanye nekhava yezicathulo zensimbi zokucindezela isampula. Ubukhulu busukela ku-0.13mm (i-padding light) kuye ku-0.55mm (amabhande okuthutha asindayo).

Ukuncipha okushisayo kwendwangu ye-Fiberglass kuyimbangela eyinhloko ye-PTFE tape dimensional ukungasebenzi. Emazingeni okushisa e-PTFE sintering (360-400°C), ingcindezi yokwaluka eyinsalela iyakhululwa. Uma kungavinjelwa, indwangu iyancipha; uma kuvinjelwa, ukucindezeleka okucashile kukhiyiwe, okubangela ukuncipha kamuva ngesikhathi sokuphulukisa okunamathelayo (150-200°C) kanye nokushisa kokugcina. Isixazululo: sebenzisa i-fiberglass esethwe ngaphambi kokushisa ene-<0.5% shrinkage ku-400 ° C, esusa ukucindezeleka okusele ngaphambi kokumboza.