PCB impedance na-ezo aka na paramita nke nguzogide na mmeghachi omume, nke na-arụ ọrụ mgbochi n'ichegharị ugbu a. Na pcb sekit osisi mmepụta, impedance ọgwụgwọ dị mkpa. Ya mere, ị maara ihe mere PCB sekit mbadamba mkpa ime impedance?

1, PCB sekit osisi ala na-atụle echichi nke electronic components, eletriki conductivity na mgbaàmà nnyefe arụmọrụ mgbe ntinye, otú ọ ga-achọ ala impedance, mma, ndị resistivity bụ ihe na-erughị 1 × 10-6 kwa square centimita n'okpuru.

2, PCB sekit osisi na mmepụta usoro na-enweta ọla kọpa sinking, tin plating (ma ọ bụ electroless plating, ma ọ bụ na-ekpo ọkụ ịgba tin), solder nkwonkwo na ndị ọzọ usoro mmepụta njikọ, na ihe eji na ndị a njikọ ga-hụ na resistivity ala, na iji hụ na n'ozuzu impedance nke PCB circuit osisi bụ ala izute ngwaahịa àgwà chọrọ, nwere ike na-arụ ọrụ nkịtị.

3, tinning nke PCB osisi bụ ihe kasị adịkarị mfe nsogbu na mmepụta nke dum sekit osisi, na ọ bụ isi njikọ na-emetụta impedance. Nnukwu ntụpọ nke kemịkalụ tin plating oyi akwa dị mfe discoloration (ma mfe oxidation ma ọ bụ delixing), ogbenye brazing, nke ga-eduga siri ike ịgbado ọkụ nke sekit osisi, elu impedance na-eduga na-adịghị mma eletriki conductivity ma ọ bụ enweghị ntụkwasị obi nke dum osisi arụmọrụ.

4, PCB sekit osisi na onye nduzi ga-enwe a dịgasị iche iche nke mgbaàmà nnyefe, mgbe ka mma ya nnyefe ọnụego na ga-amụba ya ugboro ugboro, akara onwe ya ma ọ bụrụ na etching, laminated ọkpụrụkpụ, waya obosara na ihe ndị ọzọ dị iche iche, ga-eme ka impedance. kwesịrị ịgbanwe, nke mere na mgbagha mgbagha, na-akpata na osisi arụmọrụ iju, otú i kwesịrị ịchịkwa impedance uru na a ụfọdụ nso.