Njira zowongolera zosokoneza mu ma PCB osinthika

Mu positi iyi yabulogu, tifufuza dziko la ma PCB osinthika ndikuwunika njira zosiyanasiyana zomwe zimagwiritsidwa ntchito kuwonetsetsa kuwongolera koyenera.

dziwitsani:

Kuwongolera kwa Impedans ndi gawo lofunika kwambiri popanga ndikupanga ma board osinthika osindikizidwa (Flex PCBs). Pamene matabwawa akuchulukirachulukira m'mafakitale ambiri, ndikofunikira kumvetsetsa njira zosiyanasiyana zowongolera zomwe zilipo.

Kodi PCB yosinthika ndi chiyani?

Flexible PCB, yomwe imadziwikanso kuti flexible printed circuit kapena flexible electronic device, imatanthawuza dera lamagetsi lomwe ndi lochepa thupi, lopepuka komanso losinthasintha kwambiri. Mosiyana ndi ma PCB okhwima, omwe amapangidwa pogwiritsa ntchito zinthu zolimba monga fiberglass, ma PCB osinthika amapangidwa pogwiritsa ntchito zinthu zosinthika monga polyimide. Kusinthasintha kumeneku kumawalola kupindika, kupindika ndi kozungulira kuti agwirizane ndi mawonekedwe kapena mawonekedwe aliwonse.

Chifukwa chiyani kuwongolera kwa impedance ndikofunikira mu ma PCB osinthika?

Kuwongolera kwa Impedance ndikofunikira mu ma PCB osinthika chifukwa kumatsimikizira kukhulupirika kwa chizindikiro, kumachepetsa kutayika kwa ma sign, ndikuwongolera magwiridwe antchito. Pomwe kufunikira kwa mapulogalamu apamwamba kwambiri monga mafoni a m'manja, mapiritsi, zobvala, ndi zamagetsi zamagalimoto kukukulirakulira, kusunga zowongolera kumakhala kofunika kwambiri.

Njira yoyendetsera Impedans ya PCB yosinthika:

1. Geometry yozungulira:
Circuit geometry imatenga gawo lofunikira pakuwongolera kwa impedance. Impedance imatha kusinthidwa bwino posintha kutalika kwa trace, malo ndi kulemera kwa mkuwa. Kuwerengera koyenera ndi kuyerekezera kumathandizira kukwaniritsa mtengo womwe mukufuna.

2. Zida zoyendetsedwa ndi dielectric:
Kusankhidwa kwa zinthu za dielectric kumakhudza kwambiri kuwongolera kwa impedance. Ma PCB othamanga kwambiri nthawi zambiri amagwiritsa ntchito zida zotsika-dielectric-nthawi zonse kuti achepetse kuthamanga kwa ma siginecha kuti akwaniritse zowongolera.

3. Masinthidwe a Microstrip ndi stripline:
Masanjidwe a Microstrip ndi stripline amagwiritsidwa ntchito kwambiri pakuwongolera ma PCB osinthika. Microstrip imatanthawuza kasinthidwe komwe ma conductive amayikidwa pamwamba pa dielectric material, pomwe stripline imaphatikizapo sandwiching conductive trace pakati pa zigawo ziwiri za dielectric. Masinthidwe onsewa amapereka mawonekedwe odziwikiratu a impedance.

4. Capacitor yophatikizidwa:
Ma capacitor ophatikizidwa amagwiritsidwanso ntchito kuti apereke mayendedwe apamwamba poyang'anira impedance. Kugwiritsa ntchito zida zophatikizika monga makanema kumathandizira kuti pakhale kufanana kwapanthawi zonse mu PCB yosinthika.

5. Kuphatikizika kosiyana:
Kuzindikiritsa kosiyana kumagwiritsidwa ntchito kwambiri pamalumikizidwe othamanga kwambiri ndipo kumafuna kuwongolera kolondola kwa impedance. Mwa kulunzanitsa molondola zotsatana ndikusunga malo osasinthika, kutsekereza kumatha kuwongoleredwa mwamphamvu, kuchepetsa kuwunika kwa ma sign ndi crosstalk.

6. Njira yoyesera:
Kuwongolera kwa Impedans kumafuna kuyesedwa kolimba ndi kutsimikizira kuti zitsimikizidwe kuti zikugwirizana ndi kapangidwe kake. Matekinoloje monga TDR (Time Domain Reflectometry) ndi oyesa a impedance amagwiritsidwa ntchito kuyeza ndikutsimikizira mayendedwe osiyanasiyana.

Pomaliza:

Kuwongolera kwa Impedans ndi gawo lofunikira popanga ma PCB osinthika kuti akwaniritse zosowa zamakompyuta amakono. Mainjiniya amatha kukwaniritsa kuwongolera koyenera pogwiritsa ntchito ma geometry ozungulira, zida zoyendetsedwa ndi dielectric, masanjidwe enaake monga microstrip ndi stripline, ndi njira monga luso lophatikizika ndi ma pairing osiyana. Kuyesa mozama ndi kutsimikizira kumagwira ntchito yofunika kwambiri pakuwonetsetsa kulondola kwa impedance ndi magwiridwe antchito. Pomvetsetsa njira zowongolera izi, opanga ndi opanga atha kupereka ma PCB odalirika komanso apamwamba kwambiri pamafakitale osiyanasiyana.