Kev Txhim Kho Ntawm Ntim Tshuab

Cov kev sib xyaw ua ke ntxov tshaj plaws tau siv cov khoom siv ceramic tiaj tiaj, uas tau siv los ntawm cov tub rog tau ntau xyoo vim nws qhov kev ntseeg siab thiab me me. Kev lag luam ntim khoom sai sai hloov mus rau ob lub ntim hauv kab, pib nrog ceramics thiab tom qab ntawd yas. Nyob rau xyoo 1980s, cov pins ntawm VLSI circuits tau dhau ntawm daim ntawv thov txwv ntawm cov ntim ntim, thiab thaum kawg tau coj mus rau qhov tshwm sim ntawm tus pin grid arrays thiab chip carriers.

Nto mount ntim tau tshwm sim nyob rau hauv thaum ntxov 1980s thiab tau nrov nyob rau hauv lig 1980s. Nws siv cov ko taw nyias nyias, thiab tus pin puab yog seagull tis lossis J-hom. Ua ib qho piv txwv me me integrated circuit (SOIC), nws yog 30-50 feem pua ​​​​tsawg dua nyob rau hauv cheeb tsam thiab 70 feem pua ​​​​tsawg nyob rau hauv thickness tshaj qhov sib npaug dip. Cov pob no muaj seagull tis zoo li tus pins protruding ntawm ob sab ntev, thiab tus pin spacing yog 0.05 ntiv tes.

Cov qauv me me integrated circuit (SOIC) thiab PLCC pob. Hauv xyoo 1990, txawm hais tias PGA pob khoom tseem siv tau nyob rau hauv high-end microprocessors. PQFP thiab nyias pob ntawv me me (TSOP) tau dhau los ua pob khoom siv rau cov khoom siv pin siab. Intel thiab AMD's high-end microprocessors tau txav los ntawm PGA (pine grid array) ntim rau hauv av grid array (LGA) ntim.

Pob kab sib chaws array pob pib tshwm nyob rau xyoo 1970s. Hauv xyoo 1990, flip chip pob grid array pob nrog ntau tus pins dua li lwm cov pob khoom tau tsim. Nyob rau hauv lub pob FCBGA, qhov tuag yog flipped nce thiab nqis, thiab txuas mus rau lub solder pob ntawm lub pob los ntawm ib tug puag txheej zoo li PCB es tsis txhob ntawm cov xov hlau. Lub pob FCBGA tso cai rau lub tswv yim / tso zis teeb liab array (hu ua I / O cheeb tsam) kom muab faib rau saum npoo ntawm cov nti, es tsis txwv rau lub periphery ntawm lub nti. Hauv kev ua lag luam niaj hnub no, kev ntim khoom kuj yog ib feem ntawm kev ywj pheej, thiab ntim tshuab kuj tseem cuam tshuam rau qhov zoo thiab cov txiaj ntsig ntawm cov khoom.