QFN pob

Quad tiaj pob nrog bumper. Ib qho ntawm QFP pob, protrusions (cushion pads) yog muab nyob rau ntawm plaub lub ces kaum ntawm lub pob lub cev los tiv thaiv cov pins los ntawm kev khoov thiab deformed thaum lub sij hawm thauj mus los. American semiconductor manufacturers feem ntau siv cov pob no hauv circuits xws li microprocessors thiab ASICs. Qhov chaw nruab nrab ntawm tus pins yog 0.635mm, thiab tus naj npawb ntawm cov pins yog li ntawm 84 txog 196.

MQUAD (hlau quad)

Ib pob QFP tsim los ntawm Olin Company ntawm Tebchaws Meskas. Ob lub hauv paus phaj thiab lub hau npog yog ua los ntawm txhuas thiab kaw nrog cov nplaum. Nyob rau hauv cov xwm txheej ntawm huab cua txias, lub zog ntawm 2.5W ~ 2.8W tuaj yeem zam tau. Nyiv lub Shinko Hluav Taws Xob Kev Lag Luam Co., Ltd. tau tso cai pib tsim khoom hauv xyoo 1993.

L-QUA

Ib qho ntawm cov ceramic QFPs. Aluminium nitride yog siv rau ntim substrates, lub thermal conductivity ntawm lub hauv paus yog 7 mus rau 8 lub sij hawm siab tshaj li ntawm alumina, thiab nws muaj zoo cua kub dissipation. Lub thav duab ntawm lub pob yog ua los ntawm alumina, thiab nti yog kaw los ntawm potting, yog li suppressing tus nqi. Nws yog ib pob tsim rau logic LSI, uas tuaj yeem tso cai rau W3 lub zog raws li huab cua txias. 208-pin (0.5mm nruab nrab nrug) thiab 160-pin (0.65mm nruab nrab nrug) LSI logic pob tau tsim, thiab ntau lawm pib thaum Lub Kaum Hli 1993.

Ib qho ntawm cov pob khoom nto mount. Cov pins raug coj tawm ntawm plaub sab ntawm pob hauv J-zoo li nqes. Nws yog lub npe teev tseg los ntawm Nyiv Electronic Machinery Industry Association. Tus pin center nrug yog 1.27mm. Cov ntaub ntawv yog yas thiab ceramic.

Feem ntau, yas QFJ yog hu ua PLCC (yas coj nti cab kuj), uas yog siv nyob rau hauv circuits xws li microcomputers, rooj vag arrays, DRAM, ASSP, thiab OTP. Pin suav los ntawm 18 mus rau 84.

Ceramic QFJ tseem hu ua CLCC (ceramic led chip carrier), JLCC (J-leaded chip carrier). Cov pob nrog lub qhov rais yog siv rau UV-erasable EPROMs thiab microcomputer nti circuits nrog EPROMs. Pin suav los ntawm 32 mus rau 84.

QFN (quad flat non-leaded pob)

QFN (quad flat non-leaded pob)

Plaub-sab leadless tiaj tus pob, ib qho ntawm cov pob khoom saum npoo av, yog ib pob rau kev kub ceev thiab siab ICs. Tam sim no feem ntau hu ua LCC. QFN yog lub npe sau los ntawm Nyiv Electron Machinery Manufacturers Association. Muaj cov electrode hu rau plaub sab ntawm pob. Txij li thaum tsis muaj kev coj ua, thaj chaw mounting yog me dua li ntawm QFP, thiab qhov siab qis dua ntawm QFP. Txawm li cas los xij, thaum muaj kev ntxhov siab tshwm sim ntawm cov ntawv luam tawm thiab cov pob, nws tsis tuaj yeem txo qhov kev sib cuag ntawm electrode. Yog li ntawd, nws yog ib qho nyuaj rau muaj ntau li electrode hu raws li muaj QFP pins, feem ntau ntawm 14 mus rau 100.

Cov khoom siv yog ceramic thiab yas. Yeej ceramic QFN thaum muaj LCC cim. Lub electrode contact center nrug yog 1.27mm. Yas QFNs yog ib pob uas tsis muaj nqi ntawm lub khob epoxy luam ntawv substrate. Ntxiv rau 1.27mm, lub electrode contact center nrug kuj muaj ob hom: 0.65mm thiab 0.5mm. Cov pob no tseem hu ua yas LCC, PCLC, P-LCC, thiab lwm yam.

PCLP (cov ntawv luam tawm Circuit Board leadless pob)

PCB tsis siv neeg pob. Lub npe tau txais los ntawm Fujitsu Corporation ntawm Nyiv rau yas QFN (yas LCC). Muaj ob qhov tshwj xeeb ntawm tus pin center nrug, {{0}}.55mm thiab 0.4mm. Nws yog tam sim no nyob rau hauv txoj kev loj hlob.

P-LCC (yas teadless nti cab kuj) (yas coj nti cab kuj)

Qee lub sij hawm nws yog lwm lub npe rau yas QFJ, qee zaum nws yog lwm lub npe rau QFN (yas LCC) (saib QFJ thiab QFN). Qee lub tuam txhab LSI siv PLCC los qhia cov pob khoom coj, thiab P-LCC los qhia cov pob tsis muaj lead los qhia qhov txawv.

QFI (quad flat I-leaded pob) plaub-sided I-leaded tiaj pob

Ib qho ntawm cov pob khoom nto mount. Cov pins raug coj tawm ntawm plaub sab ntawm lub pob thiab tsim ib qho I-zoo li downward. Kuj hu ua MSP (mini square pob). Lub mount thiab cov ntawv luam tawm Circuit Board yog txuas nrog pob tw vuam. Txij li cov pins tsis muaj qhov cuam tshuam, qhov chaw txuas yog me dua li ntawm QFP. Hitachi tsim thiab siv pob no rau video analog ICs. Tsis tas li ntawd, PLL IC ntawm Motorola Tuam Txhab Nyij Pooj kuj tau txais cov pob no. Qhov nruab nrab ntawm tus pins yog 1.27 hli, thiab tus naj npawb ntawm tus pins nyob ntawm 18 txog 68.