Mapangidwe a laminated makamaka amatsatira malamulo awiri:
1. Chigawo chilichonse cha waya chiyenera kukhala ndi chigawo chotsatira (mphamvu kapena pansi);
2. Chigawo chachikulu cha mphamvu choyandikana ndi chosanjikiza chapansi chiyenera kusungidwa pamtunda wocheperapo kuti chipereke mphamvu yogwirizanitsa;
Zotsatirazi zikulemba mndandanda kuchokera pa bolodi la zigawo ziwiri kufika pa bolodi la zigawo zisanu ndi zitatu mwachitsanzo kufotokozera:
1. Stacking wa single-mbali PCB bolodi ndi iwiri mbali PCB bolodi
Kwa matabwa awiri osanjikiza, chifukwa cha chiwerengero chochepa cha zigawo, palibenso vuto lamination. Kuwongolera kwa ma radiation a EMI kumaganiziridwa makamaka kuchokera ku mawaya ndi masanjidwe;
Kugwirizana kwa ma elekitiromu kwa ma board osanjikiza amodzi ndi matabwa amitundu iwiri kwakhala kodziwika kwambiri. Chifukwa chachikulu cha izi ndi chakuti malo ozungulira chizindikiro ndi aakulu kwambiri, omwe samangotulutsa ma radiation amphamvu a electromagnetic, komanso amachititsa kuti dera likhale lokhudzidwa ndi kusokoneza kwakunja. Kupititsa patsogolo kuyenderana kwa ma elekitiroma a dera, njira yosavuta ndikuchepetsa gawo lozungulira la chizindikiro chachikulu.
Chizindikiro chofunikira: Pakuwona kuyanjana kwamagetsi, ma siginecha ofunikira makamaka amatanthawuza ma siginecha omwe amapanga ma radiation amphamvu ndi ma sign omwe amakhudzidwa ndi dziko lakunja. Zizindikiro zomwe zimatha kutulutsa ma radiation amphamvu nthawi zambiri zimakhala zanthawi ndi nthawi, monga mawotchi otsika kapena ma adilesi. Zizindikiro zomwe zimakhudzidwa ndi kusokoneza ndi zizindikiro za analogi zomwe zili ndi milingo yotsika.
Mabodi osanjikiza amodzi kapena awiri nthawi zambiri amagwiritsidwa ntchito pamapangidwe a analogi otsika pansi pa 10KHz:
1) Kuwunika kwa mphamvu pamzere womwewo kumayendetsedwa mozungulira, ndipo kutalika kwa mizere kumachepetsedwa;
2) Poyendetsa magetsi ndi mawaya pansi, ayenera kukhala pafupi wina ndi mzake; ikani waya pansi pa mbali ya makiyi a chizindikiro, ndipo waya wapansi uwu uyenera kukhala pafupi kwambiri ndi waya wa chizindikiro. Mwanjira iyi, malo ang'onoang'ono ozungulira amapangidwa ndipo kukhudzidwa kwa ma radiation osiyanitsa kusokoneza kwakunja kumachepetsedwa. Pamene waya wapansi akuwonjezeredwa pafupi ndi waya wa chizindikiro, chipika chokhala ndi dera laling'ono kwambiri chimapangidwa. Chidziwitso chamakono chidzatengadi chipikachi m'malo mwa mawaya ena apansi.
3) Ngati ndi bolodi lozungulira la zigawo ziwiri, mukhoza kuyala waya pansi pambali pa mzere wa chizindikiro kumbali ina ya bolodi la dera, nthawi yomweyo pansi pa mzere wa chizindikiro, ndipo mzere woyamba uyenera kukhala waukulu momwe mungathere. Malo ozungulira omwe amapangidwa motere ndi ofanana ndi makulidwe a bolodi la dera lochulukitsa ndi kutalika kwa mzere wa chizindikiro.
Awiri ndi anayi wosanjikiza laminates
1. SIG－GND(PWR)－PWR (GND)－SIG;
2. GND－SIG(PWR)－SIG(PWR)－GND;
Pamapangidwe awiri omwe ali pamwambawa, vuto lomwe lingakhalepo ndi makulidwe a board a 1.6mm (62mil). Kutalikirana kosanjikiza kudzakhala kwakukulu kwambiri, komwe sikungokhala koyipa pakuwongolera kutsekeka, kulumikizana kwapakati ndi kutchingira; makamaka kusiyana kwakukulu pakati pa ndege zapansi pa mphamvu kumachepetsa mphamvu ya bolodi ndipo sikuthandiza kuti phokoso likhale losefera.
Kwa chiwembu choyamba, nthawi zambiri chimagwiritsidwa ntchito pazomwe pali tchipisi tambiri pa bolodi. Chiwembu chamtunduwu chikhoza kukhala bwino pakuchita kwa SI, sichabwino kwambiri pakuchita kwa EMI, makamaka kuyenera kuwongolera ndi waya ndi zina. Chisamaliro chachikulu: Chigawo cha pansi chimayikidwa pazitsulo zolumikizira chizindikiro ndi chizindikiro cholimba kwambiri, chomwe chimapindulitsa kuyamwa ndi kupondereza ma radiation; onjezani dera la board kuti liwonetse lamulo la 20H.
Pakutha kwachiwiri, nthawi zambiri amagwiritsidwa ntchito pomwe kachulukidwe ka chip pa bolodi ndi otsika mokwanira ndipo pali malo okwanira kuzungulira chip (ikani mphamvu yofunikira yamkuwa). Mu chiwembu ichi, wosanjikiza kunja kwa PCB ndi pansi wosanjikiza, ndipo zigawo ziwiri zapakati ndi chizindikiro / mphamvu zigawo. Mphamvu yamagetsi pa chizindikiro chosanjikiza imayendetsedwa ndi mzere wotakata, womwe ungapangitse njira yolepheretsa mphamvu yamagetsi yotsika, ndi kulepheretsa kwa njira ya microstrip ya chizindikiro ndi yotsika, ndipo ma radiation amtundu wamkati akhoza kukhala. kutetezedwa ndi wosanjikiza wakunja. Kuchokera pakuwona kuwongolera kwa EMI, iyi ndiye mawonekedwe abwino kwambiri a 4-wosanjikiza PCB omwe alipo.
Chisamaliro chachikulu: Mtunda pakati pa zigawo ziwiri zapakati za chizindikiro ndi zigawo zosakanikirana za mphamvu ziyenera kukulitsidwa, ndipo njira yolumikizira mawaya iyenera kukhala yoyima kuti ipewe crosstalk; malo a board ayenera kuyendetsedwa moyenera kuti awonetse lamulo la 20H; ngati mukufuna kuwongolera kutsekeka kwa wiring, yankho lomwe lili pamwambapa liyenera kusamala kwambiri kuti muyendetse mawaya Okonzedwa pansi pa chilumba chamkuwa kuti apange mphamvu ndi kuyika pansi. Kuonjezera apo, mkuwa pamagetsi kapena pansi ayenera kulumikizidwa momwe zingathere kuti zitsimikizidwe kuti DC ndi yotsika kwambiri.
Atatu, asanu ndi limodzi laminate
Pamapangidwe okhala ndi kachulukidwe kakang'ono ka chip komanso mawotchi apamwamba kwambiri, mapangidwe a board 6-wosanjikiza ayenera kuganiziridwa, ndipo njira yodulira ikulimbikitsidwa:
1. SIG－GND－SIG－PWR－GND－SIG;
Kwa mtundu uwu wa chiwembu, mtundu uwu wa laminated chiwembu ukhoza kupeza kukhulupirika bwino kwa chizindikiro, chizindikiro chosanjikiza chili pafupi ndi nthaka yosanjikiza, mphamvu yosanjikiza ndi nthaka yosanjikiza imaphatikizidwa, kutsekereza kwa chingwe chilichonse kumayendetsedwa bwino, ndi ziwiri. The stratum imatha kuyamwa bwino mizere ya maginito. Ndipo pamene magetsi ndi nthaka wosanjikiza zili bwino, zingapereke njira yabwino yobwereranso pa chizindikiro chilichonse.
2. GND－SIG－GND－PWR－SIG－GND;
Kwa mtundu uwu wa chiwembu, chiwembu choterechi ndi choyenera pokhapokha kuti kachulukidwe ka chipangizocho sichokwera kwambiri, mtundu uwu wa lamination uli ndi ubwino wonse wa lamination chapamwamba, ndipo ndege yapansi ya zigawo zapamwamba ndi zapansi ndizofanana. wathunthu, womwe ungagwiritsidwe ntchito ngati wosanjikiza bwino woteteza Kuti agwiritse ntchito. Tikumbukenso kuti wosanjikiza mphamvu ayenera kukhala pafupi wosanjikiza kuti si chigawo chachikulu pamwamba, chifukwa ndege pansi adzakhala wokwanira. Chifukwa chake, ntchito ya EMI ndiyabwino kuposa yankho loyamba.
Chidule Chachidule: Kwa dongosolo la bolodi la magawo asanu ndi limodzi, mtunda pakati pa gawo la mphamvu ndi pansi uyenera kuchepetsedwa kuti upeze mphamvu zabwino ndi kugwirizanitsa pansi. Komabe, ngakhale makulidwe a bolodi ndi 62mil ndipo malo osanjikiza amachepetsedwa, sikophweka kuwongolera mipata pakati pa mphamvu yayikulu ndi gawo laling'ono kwambiri. Poyerekeza ndondomeko yoyamba ndi yachiwiri, mtengo wa ndondomeko yachiwiri udzawonjezeka kwambiri. Choncho, ife kawirikawiri kusankha njira yoyamba pamene stacking. Mukamapanga, tsatirani lamulo la 20H ndi kapangidwe ka malamulo a galasi.
Ma laminates anayi ndi asanu ndi atatu
1. Iyi si njira yabwino yosungiramo zinthu chifukwa chosayamwa bwino ndi ma elekitirodi komanso kutsekeka kwakukulu kwamagetsi. Kapangidwe kake ndi motere:
1.Signal 1 gawo pamwamba, microstrip wiring wosanjikiza
2. Signal 2 mkati mwa microstrip wiring wosanjikiza, wosanjikiza bwino mawaya (X njira)
3.Pansi
4. Mzere wodutsa wa Signal 3, wosanjikiza bwino wanjira (Y direction)
5.Signal 4 stripline routing layer
6.Mphamvu
7. Signal 5 mkati microstrip wiring wosanjikiza
8.Signal 6 microstrip trace layer
2. Ndi mtundu wachitatu stacking njira. Chifukwa cha kuwonjezera kwa gawo lofotokozera, ili ndi magwiridwe antchito abwino a EMI, ndipo mawonekedwe amtundu uliwonse wamtundu uliwonse amatha kuwongoleredwa bwino.
1.Signal 1 gawo pamwamba, microstrip wiring wosanjikiza, wabwino waya wosanjikiza
2. Ground stratum, mayamwidwe abwino a electromagnetic wave
3. Signal 2 stripline routing layer, njira yabwino
4. Wosanjikiza mphamvu yamagetsi, kupanga mayamwidwe abwino kwambiri a electromagnetic ndi wosanjikiza pansi pa 5. Wosanjikiza wapansi
6.Signal 3 stripline routing layer, njira yabwino yosanja
7. Njira yamagetsi, yokhala ndi vuto lalikulu lamagetsi
8.Signal 4 microstrip wiring wosanjikiza, wabwino waya wosanjikiza
3. Njira yabwino kwambiri yosungiramo zinthu, chifukwa chogwiritsa ntchito ndege zambiri zowonetsera pansi, ili ndi mphamvu yabwino kwambiri ya geomagnetic mayamwidwe.
1.Signal 1 gawo pamwamba, microstrip wiring wosanjikiza, wabwino waya wosanjikiza
2. Ground stratum, mayamwidwe abwino a electromagnetic wave
3. Signal 2 stripline routing layer, njira yabwino
4.Power wosanjikiza wa mphamvu, kupanga mayamwidwe abwino kwambiri a electromagnetic ndi wosanjikiza wapansi pansi pa 5.Ground wosanjikiza
6.Signal 3 stripline routing layer, njira yabwino yosanja
7. Ground stratum, mayamwidwe abwino a electromagnetic wave mayamwidwe
8.Signal 4 microstrip wiring wosanjikiza, wabwino waya wosanjikiza
Momwe mungasankhire magulu angati a matabwa omwe amagwiritsidwa ntchito popanga komanso momwe angawasungire zimadalira zinthu zambiri monga kuchuluka kwa ma network a siginecha pa bolodi, kachulukidwe kachipangizo, kachulukidwe ka PIN, ma frequency azizindikiro, kukula kwa bolodi ndi zina zotero. Pazifukwa izi, tiyenera kuganizira mozama. Kuti ma netiweki azidziwitso achuluke, kuchulukira kwa chipangizocho, kuchuluka kwa ma PIN komanso kuchuluka kwa ma siginoloji, kapangidwe ka bolodi la multilayer kuyenera kutsatiridwa momwe kungathekere. Kuti mupeze ntchito yabwino ya EMI, ndi bwino kuwonetsetsa kuti chizindikiro chilichonse chili ndi gawo lake.