Te Keri Hōhonu Whakahaeretia i roto i te Hanganga PCB: Te Keri Whakamuri he aha te keri whakamuri i roto i te PCB?
Ko te keri whakamuri i roto i ngā papa waea tānga maha-paparanga te tukanga tango i te porotiti hei hanga vias, kia taea ai e ngā tohu te neke mai i tētahi paparanga o te papa ki tētahi atu. (Ka puta he whakaata, he marara, he whakaroa, me ētahi atu raruraru i ngā porotiti i te wā e tukuna ana te tohu, ka meinga ai te tohu kia hē.) Ko te keri i te hohonutanga whakahaeretia me whai pūkenga uaua. Ko te hanga papa hiko maha-paparanga, pērā i ngā papa 12-paparanga, me hono te paparanga tuatahi ki te paparanga tuaiwa. I te nuinga o te wā, ka keri mātou i roto i ngā kōhao kotahi noa i mua i te whakakikorua i ngā vias. Nō reira, ka hono tonu te papa tuatahi me te papa 12. Ko te mea pono, me hono noa te papa tuatahi ki te papa tuaiwa. Nā te mea kāore he waea e hono ana i te 10 ki te 12 taumata, he rite ki ngā pou. He pānga tēnei pou ki te ara tohu, ā, ka whakararu pea i te pono o te tohu whakawhitiwhiti kōrero. Nō reira, i keria he kōhao tuarua mai i te taha ke o te pou tāpiri (e kiia ana ko te STUB i roto i te umanga).
Nō reira, e mōhiotia ana ko te keri whakamuri, engari he iti ake te ma o te keri i te nuinga o te wā nā te mea ka hiko te parahi i te taahiraa e whai ake nei, ā, he koi hoki te pito o te keri. Nō reira, ka waiho he pito iti rawa; ko te roa o tēnei STUB e toe ana e mōhiotia ana ko te uara B, ā, ko te tikanga kei waenga i te 50 ki te 150 UM.
Hangarau PCB keri-muri
Nā te mea me whakaiti te ngaronga o te tohu mō ngā tono auau teitei, me whai kōhao mā roto e hono ana i ngā paparanga kia rere ai te tohu i a ia e neke ana mai i tētahi ki tētahi. E taunakihia ana kia tangohia te parahi toenga mai i tēnei kōhao mō tēnei tono nā te mea he pūihi tana mahi, ā, ka pā ki te tuku mena ka rere te tohu mai i te paparanga tuatahi ki te paparanga tuarua i roto i tētahi paparanga 20, hei tauira.
Hei whakapiki i te pumau o te tohu, ka keria e mātou te parahi "tāpiri" i roto i te kōhao mā te whakamahi i te keri-muri (te hohonutanga whakahaeretia i te tuaka-z). Ko te hua pai ko te poto o te pou (te parahi "tāpiri" rānei). I te nuinga o te wā, me 0.2mm te rahi o te keri-muri i te via e rite ana.
Teka tangohia e te tukanga keri tuara ngā kakaumai i ngā kōhao kua whakakikoruatia (vias). Kāore e hiahiatia ngā poro /ngā wāhanga o ngā vias kāore i whakamahia, e toro atu ana i tua atu i te paparanga o roto whakamutunga e hono ana.
Ka taea e ngā pūngāwerewere te arahi kingā whakaaroaro, mengā raruraru o te kaha, te ine hiko me te aukatiKa nui haere te kino o ēnei hapa motumotu i te pikinga ake o te tere horapa.
Papamuriā, inā koa ko ngā Papa Ara Iahiko Tānga matotoru, ka taea te tu atungā raruraru nui o te pono o te tohumā roto i ngā poro. Mō Ngā PCB Auautanga Teitei(hei tauira, me te whakahaere i te Ārai), te tono o te keri whakamuri, me te tono ongā vias matapo me te tanumia, ka taea te noho hei wāhanga o te otinga.
Ka taea te whakamahi i te whakakoi tuara kitetahi momo papa hikoina he iti noa ngā whakaaro mō te hoahoa me te tahora ka puta mai i ngā poupou, ā, me maumahara ki te ōwehenga āhua ina whakamahia ana ngā poupou matapo.
Ngā āhuatanga o te keri whakamuri PCB
Ngā Painga o te Keri Whakamuri
● Whakaitihia te pokanoa haruru me te wiri whakatau;
● Whakapai ake i te pono o te tohu;
● Te whakaiti i te matotoru ā-rohe;
● Whakaitihia te whakamahinga o ngā via huna me ngā via matapo, me te whakaiti i te uauatanga o te hanga PCB;
● He iti ake te tere hapa moka (BER);
● He iti ake te whakaiti i te tohu me te pai ake o te taurite aukati;
● He iti noa te pānga ki te hoahoa me te tahora;
● Te whakanui ake i te whānui o te hongere;
● Te pikinga o ngā tere raraunga;
● te whakaiti i ngā tukunga EMI/EMC mai i te pito o te pou;
● Te whakaiti i te whakaohooho o ngā aratau orooro;
● Kua whakaitihia te whakawhitiwhiti kōrero mā-ki-mā-mā;
● He iti ake ngā utu i ngā whakapiringa raupapa.
Te Huakore o te Keri Whakamuri
He maha ngā raruraru o ngā tohu teitei, ā, tera pea e pā ana ki te kore e whakamahia paitia ngā poupou. Me titiro tata atu tātou ki ētahi o ngā raruraru o ngā poupou.
Te Whakaoti Whakaoti i te Wiri:
He wā ngā karaka e rua, ā, ko te nui o te hapa wā e kiia ana ko te wiri. Ko te wiri ārai he mea e mōhiotia ana ko te whakarerekētanga wā auau (arā, he iti).
Te whakaiti i te tohu:
Ina whakaitihia te oro, ka heke tōna kaha, ā, ka ngoikore haere te pā o te manawa.
Te irahiko mai i te EMI:
Ka taea te whakamahi i tētahi poupou via hei pūihi, e whakaputa ana i te EMI.
Ngā āhuatanga whānui
● He papa mārō te nuinga kei muri;
● E whakamahia ana i runga i ngā paparanga e 8, neke atu rānei;
● Neke atu i te 2.5mm te matotoru o te papa;
● Ko te iti rawa o te rahi pupuri he 0.3mm;
● He 0.2mm te rahi o te keri tuara i ngā vias;
● Te ātete ki te hohonutanga o te keri muri+/-0.05MM.
He aha te momo PCB e hiahia ana kia kerihia ki muri?
Ko te tikanga, ka pokaia ngā kōhao o te papa PCB mā roto i te papa (mai i runga ki raro). Mena kei te tata te tohu e hono ana i ngā kōhao mā te paparanga o runga (paparanga o raro rānei), ka puta he wehenga porotaka i te kōhao mā o te hononga hononga PCB, ka pā ki te kounga o te tohu, ka puta hoki ngā whakaata. Ko ngā tohu e tere haere ana ka pāngia e tēnei pānga.
Hei whiwhi i te kounga teitei o te tuku tohu, e mārama whānuitia ana me whai whakaaro ki te ara iahiko i runga i te papa PCB me ana Tohu i te tere o te 1Gbps kia uru atu ai te hoahoa keri-muri. Ko te tikanga, ko te hoahoa i ngā raina hononga tere-teitei me whai hangarau pūnaha, ā, ehara i te mea ngāwari pērā i te āhua. Mena kāore i te roa rawa ngā hononga hononga pūnaha, i te kaha rānei o te kaha o te puku o te maramara, tera pea he kore hapa te kounga tohu me te kore he keri-muri. Nō reira, ko te whakatauira hononga hononga pūnaha te tikanga tino tika mō te whakatau mena me keri-muri, kāore rānei.
Tērā pea e mōhio ana koe, haunga te whakamahi i te hangarau keri whakamuri, ka taea hoki te whakamahi i ngā tikanga hanga maha hei whakaiti, hei whakapai ake rānei i te roa o te pou. Kei roto i ēnei ko ngā whakaritenga whakarārangi rerekē, te nekehia o ngā ara ara iahiko ki ngā paparanga e tata ana ki te pito o te pou via, ngā poka vias (microvias) i kerihia e te laser, ngā vias matapo me te tanumia rānei. Hei tāpiri, i te mea kei te whakamahia ētahi atu tikanga hei whakaiti i te whakaata tohu i runga i ngā papa auau teitei (teitei ake i te 3GHz), kāore e hiahiatia te keri whakamuri.
Heoi, kāore i te whai hua tonu ēnei huarahi mai i tētahi whare hanga me te tirohanga utu hei whakaiti i te ngaronga tohu i roto i te maha o ngā PCB kiato-teitei, ngā papa-muri/papa-waenganui rānei. Nō reira, ko te kōwhiringa whai hua anake ko te keri whakamuri i te pou via. Mēnā kāore e taea te whakamahi i ngā kōhao via matapo, ka nui te keri whakamuri mō ngā papa auau teitei (neke atu i te 1GHz i roto i te 3GHz).
Nā te mea he maha ngā paparanga o te PCB, kāore e taea te hoahoa i ētahi kōhao hei kōhao matapo (hei tauira, i runga i te PCB paparanga-16, me hono ētahi kōhao mā ki ngā paparanga 1 ki te 10, me hono anō tētahi atu kōhao mā ki ngā paparanga 7 ki te 16; kāore tēnei hoahoa e pai mō ngā kōhao matapo engari he pai mō te keri whakamuri).
Me pēhea te keri whakamuri i te PCB?
Te Tukanga o te Keri Whakamuri
1. Hei kimi i te kōhao tuatahi, whakamahia te kōhao tūnga i runga i te PCB kua whakaratohia.
2. I mua i te whakakikoruatanga, whakamahia he kiriuhi maroke hei hiri i te kōhao tūnga.
3. Pania te kōhao ki te parahi hei hanga i tētahi ara iahiko ārahi.
4. Waihangahia he whakairoiro o waho ki runga i te PCB.
5. Whai muri i te waihanga i tētahi tauira paparanga o waho, ka whakahaerehia te papa whakairoiro ki runga i te PCB. I mua i tēnei tukanga, he mea nui kia hiritia te kōhao whakanoho ki tētahi kiriuhi maroke i mua i te tīmatanga o tēnei tukanga.
6. Whakamahia ngā kōhao whakatakotoranga o te keri tuatahi hei whakarārangi i te keri o muri, kātahi ka whakamahia te mata keri hei keri i ngā kōhao whakakikoruatia e hiahiatia ana tēnei tikanga.
7. Whai muri i te keri whakamutunga, me horoi te papa kia kore ai e toe ngā keri.
8. Whai muri i te manatoko o te papa, me te whakapai ake i te pono o te tohu, me aro nui ki te tika o te mahi keri.
Whakamātauria ngā Whakangungu o Muri
Kia oti te ara, me whakarite kia tika te whakatakotoranga o ngā keri whakamuri. Hei whakamana i tēnei, tahurihia ngā paparanga katoa. Ka kite koe e rua ngā tae o te taha o ngā vias. Ko te paparanga tuatahi, ko te paparanga tīmatanga rānei, ka whakaaturia ki te whero, ko te paparanga whakamutunga ka whakaaturia ki te kikorangi. He māmā noa te wehewehe i ngā vias kua keri whakamuri mai i ngā vias kē atu. Ko ngā vias kua keri whakamuri anake ka kitea me ngā tae e rua.
Pāwhiritia te Ripanga Whakamātautau i muri i te tīpako i te tauwāhi mai i te tahua matua hei kimi i te maha o ngā Vias, PTH, me ētahi atu trolls kua mahia.
Ngā uauatanga hangarau o te tukanga keri whakamuri.
1.Te whakahaere hohonu o te keri whakamuri
Mō te tukatuka tika o ngā vias matapo, he mea nui te whakahaere i te hohonu o te keri whakamuri. Ko te tika o te taputapu keri whakamuri me te matotoru waenga te mea nui ki te aro ki te hohonu o te keri whakamuri. Heoi, ka pāngia hoki te tika o te keri whakamuri e ngā taurangi o waho pēnei i te ātete o te keri, te koki pito o te keri, te pānga pa i waenga i te papa uhi me te taputapu ine, me te piko o te papa. Hei whiwhi i ngā hua pai rawa atu me te whakahaere i te tika o te keri whakamuri, he mea nui kia whiriwhiria ngā rauemi me ngā tikanga keri tika i te wā whakaputa. Ka taea e ngā kaihoahoa te kī taurangi i te tuku tohu kounga teitei me te karo i ngā raruraru pono o te tohu mā te whakahaere tika i te hohonu o te keri whakamuri.
2. Te whakahaere tika o te keri whakamuri
He mea nui te whakahaere tika o te keri whakamuri mō te whakahaere kounga o te PCB i ngā tukanga e whai ake nei. Ko te keri whakamuri ko te keri tuarua i runga i te whānui o te kōhao o te keri tuatahi, ā, he mea nui te tika o te keri tuarua. Ka pāngia te tika o te tūponotanga o te keri tuarua e ētahi taurangi, pērā i te whānui me te whakaheke o te papa, te tika o te mīhini, me ngā tikanga keri. He mea nui kia tino tika te whakahaere o te tukanga keri whakamuri kia iti ai ngā hapa me te pupuri i te tuku tohu me te pono pai.
Ko te mahi tino nui, tino wero hoki ko te keri, nā te mea ahakoa he hapa iti noa iho, ka nui pea te kino. I mua i te tuku ota, me whakaaro koe ki ngā pūkenga o te kaihanga PCB. Kei a Richfulljoy ngā papa keri tuara i te utu whaitake, ā, he tohunga ia ki te huihuinga tauira PCB. Kei roto i ā mātou painga ko te tere o te tuku me te pono teitei. Kei a Richfulljoy, he kaihanga PCB rongonui i Haina, ngā mātauranga me ngā pūkenga katoa e hiahiatia ana hei āwhina i a koe. Mena he whakaaro āu mō te huihuinga PCB, mō te tauira rānei, whakapā mai ki a mātou: mkt-2@rich-pcb.com
