Kedu ihe bụ PCB Back Drilling?
Usoro nke PCB azụ mkpọpu ala, na-na-ezo dị ka achịkwa omimi mkpọ ala, gụnyere iwepu stub na multilayer PCBs ike vias. Ebumnobi nke mkpọpu azụ bụ ikwado ọsọ nke akara n'etiti ọkwa dị iche iche nke bọọdụ na-enweghị nnyonye anya site na stubs achọghị.
Iji nye nkọwa doro anya nke usoro ịkụ azụ azụ, ka anyị tụlee ihe atụ.
Ka e were ya na enwere PCB nke nwere akwa 12 nwere oghere na-ejikọ ọkwa nke mbụ na nke iri na abụọ. Ebumnuche bụ ijikọ naanị oyi akwa mbụ na oyi akwa 9, ebe ị na-edebe 10th ruo 12th n'enweghị njikọ. Otú ọ dị, n'ígwé ndị na-ejikọtaghị ọnụ na-emepụta "stubs" nke nwere ike igbochi ụzọ mgbaàmà, na-ebute nsogbu nguzobe mgbaàmà. Ngwupu azụ na-agụnye ịpụpụ stubs ndị a n'akụkụ azụ nke osisi ahụ iji melite mgbasa ozi.
Gịnị bụ nzube nke PCB azụ mkpọpu ala?
A na-eji mkpọpu azụ PCB wepụ akụkụ nke oghere a kpụkọrọ akpụkọ (site) nke na-agafe n'ofe ikpeazụ nke PCB. Usoro a na-enyere aka ibelata okwu iguzosi ike n'ezi ihe mgbaàmà, dị ka stub resonance na mgbama ntughari, nke nwere ike ime na ngwa ngwa dijitalụ aghụghọ.
Kedu ihe bụ "akụkụ akụkụ"?
Ajụjụ gbasara bọọdụ sekit ebipụtara › TERMINOLOGY
Mmekọrịta dị n'etiti dayameta nke oghere na ogologo ya. Mgbe onye nrụpụta na-ekwu na mmepụta ha nwere “akụkụ akụkụ” nke 8: 1, ọ pụtara, dịka ọmụmaatụ, na dayameta oghere ahụ bụ 0.20 mm na PCB gbara ọkpụrụkpụ 1.60 mm.
Maka ihe owuwu HDI, akụkụ akụkụ maka microvia nwere oke na 1: 1, mana 0.7-0.8: 1 ka mma ka ọ dị mfe itinye.
Gịnị bụ uru nke PCB azụ mkpọpu ala?
Uru nke mkpọpu azụ PCB na-agụnye iguzosi ike n'ezi ihe mgbaama, mbelata ntinye ntinye, njikwa crosstalk na-abawanye, yana mmụba bandwidth. Site na iwepu akụkụ a na-ejighị ya site na gbọmgbọm, mkpọpu azụ na-ebelata resonance na mgbama, na-ebute mgbasa ozi dị ọcha na nke ziri ezi.