Kodi Rigid Flex PCB Stackup ndi chiyani

M'dziko lamakono lamakono lamakono lamakono, zipangizo zamagetsi zikupita patsogolo kwambiri komanso zowonjezereka. Kuti akwaniritse zofunikira za zida zamakonozi, ma board osindikizira (PCB) akupitiliza kusinthika ndikuphatikiza njira zatsopano zopangira. Ukadaulo umodzi wotere ndi wosasunthika wa pcb stackup, womwe umapereka maubwino ambiri potengera kusinthasintha komanso kudalirika.Kalozera watsatanetsataneyu awunika zomwe gulu lokhazikika lokhazikika la boardboard lili, mapindu ake, ndi kapangidwe kake.

Tisanalowe mwatsatanetsatane, tiyeni tikambirane kaye zoyambira za PCB stackup:

PCB stackup imatanthawuza makonzedwe a zigawo zosiyanasiyana zamagulu mkati mwa PCB imodzi. Zimaphatikizapo kuphatikiza zipangizo zosiyanasiyana kuti apange matabwa a multilayer omwe amapereka magetsi. Pachikhalidwe, ndi zolimba PCB stackup, zinthu okhwima okha ntchito gulu lonse. Komabe, ndi kukhazikitsidwa kwa zida zosinthika, lingaliro latsopano linatuluka-yokhazikika-yosinthika PCB stackup.

Ndiye, kodi laminate yolimba-flex ndi chiyani kwenikweni?

A okhwima-flex PCB stackup ndi wosakanizidwa dera bolodi amaphatikiza okhwima ndi kusinthasintha PCB zipangizo. Amakhala ndi magawo osinthika osinthika, omwe amalola bolodi kuti ipindike kapena kusinthasintha ngati pakufunika ndikusunga kukhulupirika kwake komanso magwiridwe antchito amagetsi. Kuphatikizika kwapaderaku kumapangitsa kuti ma PCB osasunthika osunthika akhale abwino kwa mapulogalamu omwe malo ndi ofunikira komanso kupindika kosunthika kumafunika, monga zobvala, zida zammlengalenga, ndi zida zamankhwala.

Tsopano, tiyeni tifufuze zaubwino wosankha mosasunthika wa PCB wamagetsi anu.

Choyamba, kusinthasintha kwake kumapangitsa kuti bolodilo ligwirizane ndi malo olimba ndikugwirizana ndi mawonekedwe osasinthasintha, kukulitsa malo omwe alipo. Kusinthasintha kumeneku kumachepetsanso kukula ndi kulemera kwa chipangizocho pochotsa kufunikira kwa zolumikizira ndi mawaya owonjezera. Kuphatikiza apo, kusowa kwa zolumikizira kumachepetsa zomwe zingalephereke, ndikuwonjezera kudalirika. Kuphatikiza apo, kuchepetsedwa kwa mawaya kumawongolera kukhulupirika kwa ma siginecha ndikuchepetsa zovuta za electromagnetic interference (EMI).

Kupanga kokhazikika kokhazikika kwa PCB kumaphatikizapo zinthu zingapo zofunika:

Nthawi zambiri imakhala ndi zigawo zingapo zolimba zolumikizidwa ndi zigawo zosinthika. Chiwerengero cha zigawo zimadalira zovuta za mapangidwe a dera ndi ntchito zomwe mukufuna. Zigawo zolimba zimakhala ndi FR-4 yokhazikika kapena yotentha kwambiri, pomwe zigawo zosinthika zimakhala za polyimide kapena zosinthika zofananira. Kuonetsetsa kuti magetsi akugwirizana bwino pakati pa zigawo zolimba ndi zosinthika, zomatira zamtundu wapadera wotchedwa anisotropic conductive adhesive (ACA) zimagwiritsidwa ntchito. Zomatira izi zimapereka kulumikizana kwamagetsi ndi makina, kuonetsetsa kuti magwiridwe antchito odalirika.

Kuti mumvetsetse kapangidwe ka PCB yokhazikika yokhazikika, nayi kusokonezeka kwa board ya 4-wosanjikiza-yokhazikika ya PCB:

Pamwamba:
Chigoba chobiriwira cha solder ndi gawo loteteza lomwe limayikidwa pa PCB (Printed Circuit Board)
Gulu 1 (Siginecha):
Base Copper wosanjikiza wokhala ndi Plated Copper traces.
Layer 2 (Layer Wamkati / Dielectric layer):
FR4: Izi ndizomwe zimagwiritsidwa ntchito mu PCBs, zomwe zimapereka chithandizo chamakina komanso kudzipatula kwamagetsi.
Layer 3 (Flex Layer):
PP: Polypropylene (PP) zomatira wosanjikiza angapereke chitetezo kwa bolodi dera
Gawo 4 (Flex Layer):
Cover layer PI: Polyimide (PI) ndi chinthu chosinthika komanso chosagwira kutentha chomwe chimagwiritsidwa ntchito ngati chotchinga pamwamba pa gawo lopindika la PCB.
Chivundikiro cha AD: perekani chitetezo kuzinthu zomwe zili pansi kuti zisawonongeke ndi chilengedwe, mankhwala kapena zokhwasula.
Gawo 5 (Flex Layer):
Base Copper layer: Chigawo china chamkuwa, chomwe chimagwiritsidwa ntchito potsata ma sign kapena kugawa mphamvu.
Gawo 6 (Flex Layer):
PI: Polyimide (PI) ndi chinthu chosinthika komanso chosatentha chomwe chimagwiritsidwa ntchito ngati maziko mu gawo losinthasintha la PCB.
Gawo 7 (Flex Layer):
Base Copper layer: Gulu linanso lamkuwa, lomwe limagwiritsidwa ntchito potsata ma siginecha kapena kugawa mphamvu.
Gawo 8 (Flex Layer):
PP: Polypropylene (PP) ndi zinthu zosinthika zomwe zimagwiritsidwa ntchito mu gawo losinthika la PCB.
Cowerlayer AD: perekani chitetezo kuzinthu zomwe zili pansi kuti zisawonongeke ndi chilengedwe chakunja, mankhwala kapena mikwingwirima.
Cover layer PI: Polyimide (PI) ndi chinthu chosinthika komanso chosagwira kutentha chomwe chimagwiritsidwa ntchito ngati chotchinga pamwamba pa gawo lopindika la PCB.
Layer 9 (Mkati mwake):
FR4: Wosanjikiza wina wa FR4 akuphatikizidwa kuti athandizidwe ndi makina owonjezera komanso kudzipatula kwamagetsi.
Layer 10 (Layer Pansi):
Base Copper wosanjikiza wokhala ndi Plated Copper traces.
Chigawo chapansi:
Green soldermask.

Chonde dziwani kuti pakuwunika kolondola komanso malingaliro enaake apangidwe, tikulimbikitsidwa kuti mufunsane ndi wopanga PCB kapena wopanga yemwe angapereke kusanthula kwatsatanetsatane ndi malingaliro kutengera zomwe mukufuna komanso zopinga zanu.

Powombetsa mkota:

Okhazikika flex PCB stackup ndi njira yodziwikiratu yomwe imaphatikiza ubwino wa zinthu zolimba komanso zosinthika za PCB. Kusinthasintha kwake, kukhazikika komanso kudalirika kumapangitsa kuti ikhale yoyenera kugwiritsa ntchito zosiyanasiyana zomwe zimafuna kukhathamiritsa kwa malo komanso kupindika kwamphamvu. Kumvetsetsa zoyambira za rigid-flex stackups ndi kapangidwe kake kungakuthandizeni kupanga zisankho mwanzeru popanga ndi kupanga zida zamagetsi. Pomwe ukadaulo ukupitilira kupita patsogolo, kufunikira kwa osasunthika okhazikika a PCB mosakayikira kuchulukirachulukira, ndikupititsa patsogolo chitukuko mderali.