Ibibi bya PCB gakondo bine-bine

Niba ubushobozi bwa interlayer butaba bunini bihagije, umurima w'amashanyarazi uzagabanywa ahantu hanini ugereranije nubuyobozi, kugirango impagarike yimikorere igabanuke kandi ibyagarutse bishobora gusubira kumurongo wo hejuru. Muri iki kibazo, umurima wakozwe niki kimenyetso urashobora kubangamira umurima wibimenyetso byegeranye byegeranye. Ntabwo aribyo twari twizeye. Kubwamahirwe, ku kibaho cya 4-santimetero 0,062, ibice biratandukanye cyane kandi ubushobozi bwa interlayer ni buto
Mugihe insinga zahindutse kuva kumurongo 1 kugeza kumurongo wa 4 cyangwa ubundi, noneho bizayobora iki kibazo cyerekanwe nkishusho
amakuru13
Igishushanyo cyerekana ko iyo ibimenyetso bikurikiranye kuva kumurongo 1 kugeza kumurongo wa 4 (umurongo utukura), kugaruka bigomba nanone guhindura indege (umurongo wubururu). Niba inshuro yikimenyetso ari ndende bihagije kandi indege zegeranye hamwe, kugaruka birashobora gutembera muri capacitance ya interlayer ibaho hagati yubutaka nububasha. Ariko, kubera kubura guhuza kwiyobora gutaziguye kugaruka, inzira yo kugaruka irahagarikwa, kandi turashobora gutekereza ko guhagarika ari inzitizi hagati yindege zerekanwa nkuko bigaragara munsi yishusho
amakuru14
Niba ubushobozi bwa interlayer butaba bunini bihagije, umurima w'amashanyarazi uzagabanywa ahantu hanini ugereranije nubuyobozi, kugirango impagarike yimikorere igabanuke kandi ibyagarutse bishobora gusubira kumurongo wo hejuru. Muri iki kibazo, umurima wakozwe niki kimenyetso urashobora kubangamira umurima wibimenyetso byegeranye byegeranye. Ntabwo aribyo twari twizeye. Kubwamahirwe, ku kibaho cya 4 cya santimetero 0,062, ibice biratandukanye cyane (byibura santimetero 0.020), kandi ubushobozi bwa interlayer ni buto. Nkigisubizo, guhuza amashanyarazi byasobanuwe haruguru bibaho. Ibi ntibishobora gutera ibibazo byubusugire bwibimenyetso, ariko bizashiraho EMI nyinshi. Iyi niyo mpamvu, iyo dukoresheje caskade, twirinda guhindura ibice, cyane cyane kubimenyetso byumuvuduko mwinshi nkamasaha.
Biramenyerewe kongeramo ubushobozi bwa decoupling capacitor hafi yinzibacyuho yinzibacyuho kugirango ugabanye inzitizi zatewe no kugaruka kwerekanwa nkuko bigaragara munsi yishusho. Nyamara, iyi capacitor ya decoupling ntacyo ikora kubimenyetso bya VHF kubera ubwinshi bwayo-rezanse. Kubimenyetso bya AC hamwe numurongo urenze 200-300 MHz, ntidushobora kwishingikiriza kumashanyarazi kugirango dukore inzira-yo kugaruka. Kubwibyo, dukeneye capacitor ya decoupling (kuri munsi ya 200-300 MHz) hamwe na capacitor nini cyane ya interineti ihuza imirongo myinshi.
amakuru15
Iki kibazo gishobora kwirindwa udahinduye urwego rwibimenyetso byingenzi. Nyamara, ubushobozi buke bwa interboard ubushobozi bwibice bine biganisha ku kindi kibazo gikomeye: guhererekanya amashanyarazi. Isaha ya sisitemu ics isanzwe isaba amashanyarazi manini yigihe gito. Mugihe cyo kuzamuka / kugwa kwumusaruro wa IC ugabanuka, dukeneye gutanga ingufu kurwego rwo hejuru. Kugirango utange isoko yishyurwa, mubisanzwe dushyira capacator ya decoupling hafi ya buri logique IC. Ariko, hariho ikibazo: mugihe turenze kwijwi ryonyine, ubushobozi bwo gukuramo ubushobozi ntibushobora kubika neza no guhererekanya ingufu, kuko kuriyi frequence capacitor izakora nka inductor.
Kubera ko ics nyinshi muri iki gihe zifite ibihe byihuta byo kuzamuka / kugwa (hafi 500 ps), dukeneye iyindi mikorere ya decoupling hamwe numurongo wo hejuru wo kwiyumvamo amajwi kurenza iy'ubushobozi bwa decoupling. Ubushobozi bwa interlayer bwibibaho byumuzunguruko birashobora kuba uburyo bwiza bwo gukuramo, mugihe ibice byegeranye bihagije kugirango bitange ubushobozi buhagije. Kubwibyo, usibye kubisanzwe bikoreshwa mubushobozi bwa decoupling, duhitamo gukoresha ingufu zegeranye cyane hamwe nubutaka kugirango dutange imbaraga zinzibacyuho kuri ics.
Nyamuneka menya ko bitewe nuburyo busanzwe bwo gukora imbaho ​​zumuzunguruko, mubisanzwe ntabwo dufite insulator zoroheje hagati yicyiciro cya kabiri nicyagatatu cyibice bine. Ikibaho cyibice bine gifite insuline zoroshye hagati yicyiciro cya kabiri nicyagatatu birashobora kugura amafaranga arenze ikibaho gisanzwe.