Txheej txheem cej luam Ntawm Chip Mounting Tshuab

Txhawm rau kom yeej ib qho chaw hauv kev sib tw ua lag luam niaj hnub no, cov khoom siv hluav taws xob hauv hluav taws xob yuav tsum tau nrhiav txoj hauv kev los txo cov nqi khoom thiab cov khoom qhia lub sij hawm, thaum tib lub sij hawm tsis tu ncua kev txhim kho cov khoom tshiab. Ntxiv nrog rau kev txhim kho cov txheej txheem tsim khoom thiab cov txheej txheem, cov khoom siv hluav taws xob yuav tsum txhawb nqa cov khoom siv hluav taws xob semiconductor kom sib koom ua haujlwm ntau dua rau hauv cov txheej txheem sib xyaw ua ke me me (PICs). Yog li ntawd, rau kev tsim thiab tsim cov khoom siv hluav taws xob high-end, ib txoj hauv kev me me, kev ua haujlwm muaj zog thiab cov nqi qis yog qhia meej rau peb. Hauv cov ntsiab lus no, niaj hnub programmable integrated circuits muaj ntau tus pins, muaj zog ua haujlwm, thiab cov ntaub ntawv sib dhos tshiab. Txawm li cas los xij, cov neeg tsim khoom siv hluav taws xob uas xav siv cov khoom siv PIC tshiab kawg yuav tsum kov yeej qee qhov teeb meem tshwm sim thaum lub sijhawm ua haujlwm. Cias muab, txhawm rau ua tiav qhov kev pab cuam PCI li, koj yuav tsum kawm qee txoj hauv kev tshiab. Fu Haoyun muab kev txhawb nqa rau lub teb chaws loj JUKI tso cov cav tov.
Kev lag luam keeb kwm yav dhau
Rau cov khoom siv PIC, DIP, PLCC lossis SOIC ntim feem ntau yog siv yav dhau los. Txawm li cas los xij, nrog qhov kev thov nce ntxiv rau cov khoom lag luam compact thiab kev ua haujlwm siab, cov khoom siv PIC siab dua yuav tsum tau ua. Cov khoom siv flash nco muaj nyob hauv SOP, TSOP, VSOP, BGA thiab micro-BGA pob. Kev ua haujlwm siab microcontrollers, CPLDs thiab FPGAs muaj nyob rau hauv QFP, BGA thiab micro-BGA pob nrog tus lej suav txij li 44 txog 800.
Vim muaj tus pin siab suav thiab daim ntawv me me, feem ntau ntawm cov khoom no tsuas yog muaj nyob rau hauv cov pob khoom zoo. Pitch Cheebtsam zoo muaj cov pins tsis yooj yim nrog qhov sib nrug ntawm tsuas yog 0.508mm (20 mils) lossis yuav luag tsis muaj kev tshem tawm. Qhov no tau ua rau kev siv cov khoom siv PIC kom tau raws li qhov kev sib tw no. PIC cov khoom siv nrog kev ua kom siab siab thiab kev ua tau zoo yog kim thiab xav tau cov cuab yeej siv zoo thiab ua tiav cov txheej txheem ua kom zoo heev.
Pitch Cheebtsam zoo yog qhov yuav tsum tau ntsib kev hem thawj los ntawm coplanarity thiab lwm yam kev puas tsuaj rau tus pin thaum lub sijhawm ua haujlwm. Yog tias cov pins puas lawm, nws yuav ua rau muaj teeb meem nrog kev ntseeg siab ntawm cov pob qij txha, uas yuav ua rau muaj qhov tsis xws luag hauv cov txheej txheem tsim khoom. Ib yam li ntawd, cov khoom siv high-density yuav siv sij hawm ntev dua rau qhov kev zov me nyuam, uas yuav txo qis kev tsim khoom.
Programming ntawm lub Circuit Court board
Cov neeg siv cov khoom siv PIC siab heev ntsib txoj kev xaiv nyuaj: teeb meem kev pheej hmoo thiab siv phau ntawv programming? Los yog nrhiav lwm txoj kev programming uas tshem tawm txoj kev kov phau ntawv?
Txhawm rau ua tiav qhov kawg, cov tuam txhab pib pib siv on-board programming (OBP). OBP yog ib txoj hauv kev yooj yim uas cov kev pab cuam PIC tom qab nws tau teeb tsa rau ntawm lub rooj tsav xwm luam tawm (PCB). Feem ntau, kev sim lossis kev ntsuas kev ua haujlwm yog ua rau ntawm lub rooj tsavxwm. Flash nco, Hluav taws xob Erasable ProgrammableRead-Only Memory (EEprom), EEprom-based CPLD li, EEprom-based FPGA li, thiab microcontrollers nrog built-in flash nco lossis EEprom yog txhua yam programmed hauv OBP daim ntawv.
Txoj kev siv ntau tshaj plaws rau kev siv OBP kom tau raws li qhov yuav tsum tau muaj ntawm lub cim xeeb flash thiab microcontrollers yog siv cov cuab yeej ntsuas tsis siv neeg (ATE) programming nrog kev pab ntawm lub txaj-ntawm-cov ntsia hlau fixture. Cov cuab yeej logic yog qhov nyuaj rau qhov kev pab cuam thiab tsis haum rau ATE txaj-ntawm-nails programming.
OBP thev naus laus zis tshiab raws li thawj IEEE cov lus qhia tshwj xeeb los txhawb kev kuaj pom tias muaj kev cia siab rau yav tom ntej. Cov kev qhia tshwj xeeb, hu ua IEEE 1149.1, qhia txog cov kab ke ntawm ciam teb scan raws tu qauv uas tau siv ntau txoj hauv kev PIC programming.
Yog tias cov tuam txhab tsim khoom siv hluav taws xob xav siv IEEE 1149.1 programming txoj kev, lawv cia siab rau cov cuab yeej tiv thaiv kev txawj ntse uas muab los ntawm ntau lub tuam txhab semiconductor. Tab sis programming nrog lawv cov cuab yeej yog qeeb heev. Tsis tas li ntawd, vim lawv txoj kev xav los tiv thaiv cov cuab yeej txawj ntse, txhua lub cuab yeej raug txwv rau cov cuab yeej siv los ntawm ib tus neeg siv. Qhov no yog qhov teeb meem loj yog tias PIC cov khoom siv ntawm lub rooj tsav xwm Circuit Court siv los ntawm ntau tus neeg siv.
Hauv cov ntsiab lus, siv OBP txoj hauv kev tuaj yeem tshem tawm qhov tshwm sim ntawm kev tuav cov cuab yeej siv thiab kev ua haujlwm rau hauv kev sim, nrog rau kev tsim khoom qeeb. Txawm li cas los xij, lub sijhawm xav tau rau kev ua haujlwm kuj tuaj yeem qeeb.
ATE Pin-on-disk programming
ATE cov cuab yeej siv thaum chiv thawj siv los ua qhov kev ntsuam xyuas hauv Circuit Court ntawm PCB cov rooj sib tham txhawm rau txheeb xyuas qhov tsis xws luag xws li qhib thiab luv kab, cov khoom ploj, thiab cov khoom tsis zoo uas tshwm sim thaum lub sijhawm tsim khoom. Pin-on-disk fixtures yog array-configured, caij nplooj ntoos hlav-loaded xeem terminals uas tsim ib tug neeg kho tshuab thiab hluav taws xob interface ntawm PCB thiab lub teeb liab-tsav circuitry ntawm ATE xeem khoom.
Thaum lub PCB tau ruaj ntseg txuas nrog tus pin-on-disk fixture, lub teeb liab-tsav circuitry ntawm ATE xeem cov cuab yeej yuav xa cov programming teeb liab mus rau lub hom phiaj ntaus ntawv PIC los ntawm tus pin-on-disk fixture thiab PCB. Ntxiv nrog rau kev kuaj xyuas qhov tsis xws luag, ATE cov cuab yeej tseem tuaj yeem siv los ua cov khoom siv PIC. Cov txheej txheem programming thiab tshem tawm cov txheej txheem rau cov khoom siv yog kos rau hauv Circuit Court board xeem txheej txheem los program lub hom phiaj ntaus ntawv.
IEEE 1149.1 Ciam Tebchaws Scan Programming
Txhawm rau nce qhov ceev thiab qhov nyuaj ntawm PCB cov rooj sib txoos, kev sim ntawm cov rooj sib tham hauv Circuit Court thiab cov khoom siv ntsib teeb meem loj, tshwj xeeb tshaj yog rau PCB cov rooj sib tham nrog qhov chaw tsawg. Yuav kom daws tau qhov teeb meem no tau zoo, ciam teb scan xeem raws tu qauv (IEEE 1149.1) tau los ua.
IEEE 1149.1 tus qauv xeem tuaj yeem tsim cov khoom siv logic lossis cov khoom siv flash nco ntawm cov rooj sib tham sib dhos los ntawm cov khoom siv ntse sab nraud. Cov cuab yeej programming no tsim ib qho kev sib txuas nrog lub rooj tsav xwm hauv Circuit Court los ntawm tus qauv xeem nkag chaw nres nkoj (Test Access Port, abbreviated li TAP). Tag nrho cov no yuav tsum tau siv JTAG kho vajtse tswj cov cuab yeej, JTAG software systems, JTAG-tshaj PCB pawg thawj coj saib, thiab plaub-xaim qhov chaw nkag nkag.
Kev ua haujlwm ib puag ncig tuaj yeem siv tau siv cov cuab yeej tshwj xeeb hauv Circuit Board programming, lossis lwm qhov kev xaiv yog siv qee cov cuab yeej muab los ntawm cov tuam txhab xws li GenRad, Hewlett-Packard thiab Teradyne ATE testers hauv Tebchaws Meskas, kom IEEE 1149.1 ciam teb scan programming tuaj yeem ua haujlwm. yuav raug muab coj los siv rau ntawm ATE cov cuab yeej xeem.
Ib qho ntawm qhov zoo tshaj plaws ntawm kev siv IEEE tus qauv yog tias nws tuaj yeem tsim ntau yam khoom siv los ntawm cov neeg muag khoom sib txawv ntawm tib PCB. Qhov no tuaj yeem txo lub sijhawm programming tag nrho thiab ua kom yooj yim rau kev tsim khoom.
Automated Programming (AP) Khoom siv
PIC thev naus laus zis txuas ntxiv mus, yog li cov cuab yeej siv tshuab ua haujlwm tshiab thiab thev naus laus zis ua kom nrawm. Piv txwv li, Data I/O's ProMaster 970 automated fine pitch programming equipment can program PIC devices in advanced package formats, including BGA, micro BGA, SOP, VSOP, TSOP, PLCC, SON thiab CSP. Dual pick-and-place (PNP) headers thiab xaiv tau 8, 10 lossis 12-pin sockets tuaj yeem ua kom cov khoom siv tau zoo tshaj plaws. Cov cuab yeej programming kuj tseem tuaj yeem koom nrog kev tswj xyuas cov cuab yeej zoo. Piv txwv li, coplanarity teeb meem thiab tus pin kev puas tsuaj yog zoo li tsis muaj nyob rau hauv vim hais tias lub integrated laser vision system muaj peev xwm xyuas kom meej qhov chaw ntawm cov cuab yeej.
Automated cluster programming feem ntau tuaj yeem yog 5 mus rau 10 npaug sai dua li ATE programming vim muaj ntau yam programming interfaces thiab PNP cov khoom teeb tsa. Ib zaug ntxiv, cov cuab yeej programming no tau tsim tshwj xeeb rau kev ua haujlwm, tsis yog rau cov ntawv xeem lossis cov haujlwm, yog li lawv tuaj yeem muab cov programming zoo heev.
Fine-pitch PIC li tuaj yeem kim heev, yog li yog tias qhov kev puas tsuaj thaum lub sij hawm tsim cov txheej txheem tuaj yeem txo qis, nws yuav ua rau cov chaw tsim khoom zoo heev. Tsis siv neeg programming tshuab uas tuaj yeem siv rau feem ntau cov khoom siv kuj hloov tau yooj yim thiab tuaj yeem hloov mus rau cov ntaub ntawv ntim khoom siab heev. Kev sib xyaw ua ke ntawm cov khoom tsim tau zoo, kev ua haujlwm siab thiab kev ua haujlwm tau ua rau qis tshaj qhov muaj peev xwm ntawm cov khoom siv feem ntau yog tsawg dua 20% ntawm ATE programming nqi.