FR4 vs. Polyimide: Iyiphi impahla elungele amasekhethi aguquguqukayo?

Kule bhulogi, sizohlola umehluko phakathi kwe-FR4 nezinto ze-polyimide kanye nomthelela wazo ekwakhiweni kwesekethe eguquguqukayo nokusebenza.

Amasekhethi avumelanayo, awaziwa nangokuthi ama-flexible printed circuits (FPC), abe yingxenye ebalulekile yezinto zikagesi zesimanje ngenxa yekhono lawo lokugoba nokusonta.Le mijikelezo isetshenziswa kakhulu ezinhlelweni ezinjengama-smartphones, amadivaysi agqokekayo, ugesi wezimoto, kanye nemishini yezokwelapha.Izinto ezisetshenziswa ekwenziweni kwesekethe eguquguqukayo zidlala indima ebalulekile ekusebenzeni nasekusebenzeni kwazo.Izinto ezimbili ezivame ukusetshenziswa kumasekhethi aguquguqukayo yi-FR4 ne-polyimide.

I-FR4 imele i-Flame Retardant 4 futhi iyi-fiberglass eqiniswe nge-epoxy laminate.Isetshenziswa kabanzi njengesisekelo samabhodi wesekethe aphrintiwe aqinile (PCBs).Kodwa-ke, i-FR4 ingasetshenziswa futhi kumasekhethi avumelana nezimo, nakuba kunemikhawulo.Izinzuzo eziyinhloko ze-FR4 amandla ayo okusebenza aphezulu kanye nokuzinza, okuyenza ifanelekele izinhlelo zokusebenza lapho ukuqina kubalulekile.Ibuye ingabizi kakhulu uma iqhathaniswa nezinye izinto ezisetshenziswa kumasekethe aguquguqukayo.I-FR4 inezindawo ezinhle kakhulu zokuvala ugesi kanye nokumelana okuhle nokushisa okuphezulu.Kodwa-ke, ngenxa yokuqina kwayo, ayiguquki njengezinye izinto ezifana ne-polyimide.

I-Polyimide, ngakolunye uhlangothi, i-polymer esebenza kahle kakhulu enikeza ukuguquguquka okukhethekile.Kuyinto ye-thermoset engakwazi ukumelana namazinga okushisa aphezulu futhi ifanele izinhlelo zokusebenza ezidinga ukumelana nokushisa.I-Polyimide ivamise ukukhethwa ukuthi isetshenziswe kumasekhethi aguquguqukayo ngenxa yokuguquguquka okuhle kakhulu nokuqina kwayo.Ingagotshwa, isongwe futhi igoqwe ngaphandle kokuthinta ukusebenza kwesifunda.I-Polyimide iphinde ibe nezindawo ezinhle zokuvala ugesi kanye ne-dielectric engaguquki, enenzuzo ekusebenzeni kwe-high-frequency.Nokho, i-polyimide ivamise ukubiza kakhulu kune-FR4 futhi amandla ayo okusebenza angase abe ngaphansi uma kuqhathaniswa.

Kokubili i-FR4 ne-polyimide zinezinzuzo kanye nemikhawulo yazo uma kuziwa ezinqubweni zokukhiqiza.I-FR4 ivamise ukukhiqizwa kusetshenziswa inqubo yokukhipha lapho ithusi eliningi liqoshwa ukuze kudalwe iphethini yesekethe efunekayo.Le nqubo ivuthiwe futhi isetshenziswa kabanzi embonini ye-PCB.I-Polyimide, ngakolunye uhlangothi, ivame ukukhiqizwa kusetshenziswa inqubo yokwengeza, efaka ukufaka izingqimba ezincanyana zethusi ku-substrate ukuze kwakhiwe amaphethini wesekethe.Inqubo inika amandla ukulandelelwa kwekhondatha okucolisekileyo kanye nesikhala esiqinile, iyenze ifanelekele amasekhethi aguquguqukayo aminyene kakhulu.

Mayelana nokusebenza, ukukhetha phakathi kwe-FR4 ne-polyimide kuncike ezidingweni ezithile zohlelo lokusebenza.I-FR4 ilungele izinhlelo zokusebenza lapho ukuqina namandla okusebenza kubaluleke kakhulu, okufana nogesi wezimoto.Inokuqina okuhle kwe-thermal futhi ingakwazi ukumelana nezimo zokushisa eziphezulu.Kodwa-ke, ukuguquguquka kwayo okulinganiselwe kungase kungafaneleki izinhlelo zokusebenza ezidinga ukugoba noma ukugoqa, njengamadivayisi agqokekayo.I-Polyimide, ngakolunye uhlangothi, iyaphumelela ezinhlelweni ezidinga ukuguquguquka nokuqina.Ikhono layo lokumelana nokugoba okuphindaphindiwe liyenza ilungele izinhlelo zokusebenza ezibandakanya ukunyakaza noma ukudlidliza okuqhubekayo, okufana nemishini yezokwelapha kanye nogesi wasemkhathini.

Ngokufigqiwe, ukukhethwa kwezinto ze-FR4 kanye ne-polyimide kumasekethe aguquguqukayo kuncike ezidingweni ezithile zohlelo lokusebenza.I-FR4 inamandla amakhulu okusebenza nokuzinza, kodwa ukuguquguquka okuncane.I-Polyimide, ngakolunye uhlangothi, inikeza ukuguquguquka okuphakeme nokuqina kodwa ingabiza kakhulu.Ukuqonda umehluko phakathi kwalezi zinto ezibalulekile kubalulekile ekuklameni nasekukhiqizeni amasekhethi avumelana nezimo ahlangabezana nokusebenza nokusebenza okudingekayo.Kungakhathaliseki ukuthi i-smartphone, idivayisi egqokekayo noma yezokwelapha, ukukhetha izinto ezifanele kubalulekile empumelelweni yamasekhethi aguquguqukayo.