Kupanga Zopangira Ma PCB Okhala ndi Ma Frequency Ambiri: Kugwirizanitsa Zatsopano ndi Zoona Zopanga

Chiyambi

Mu kapangidwe ka ma PCB apamwamba kwambiri, kapangidwe ka zinthu zopangira (DFM) Ndi mlatho wofunikira kwambiri womwe umalumikiza luso la uinjiniya ndi kupanga kopindulitsa kwambiri komanso kotsika mtengo. Kwa mainjiniya opanga ma PCB a RF, kudziwa bwino mfundo za DFM kumatanthauza kupanga ma board omwe si ogwira ntchito kokha komanso odalirika, otheka kukula, komanso opindulitsa kupanga.

Kuchokera malo osungira zinthu ku kapangidwe ka mitolo, kudzera mu kapangidwendi mawonekedwe a pedi, tsatanetsatane uliwonse uyenera kuganizira zenizeni za zipangizo zomwe zimagwiritsidwa ntchito pafupipafupi komanso kulekerera kupanga. Nkhaniyi ikufotokoza zinthu zofunika kwambiri pakupanga ma PCB omwe amagwiritsidwa ntchito pafupipafupi komanso momwe zimakhudzira khalidwe, magwiridwe antchito, komanso mtengo.

1. Kugwirizana kwa Kapangidwe ka Trace ndi Kupanga

Kukula kwa Trace ndi Malo Abwino Kwambiri

Mu ma PCB okhala ndi ma frequency apamwamba, m'lifupi ndi malo ocheperako zimakhudza zonse ziwiri magwiridwe antchito amagetsi (monga, kulamulira kwa impedance) ndi phindu la kupanga.

• Kulepheretsa cholinga: 50Ω kapena 75Ω—imafuna mulifupi/malo olondola owerengera pogwiritsa ntchito laminate Dk
• Zoletsa kupanga: Pazinthu zomwe zimagwiritsa ntchito pafupipafupi, kusinthasintha kwa njira kumakhala kovuta kwambiri kuposa ndi FR-4 yokhazikika

Malangizo Opangira KapangidwePewani kupititsa patsogolo malire otsika a kulekerera kwa etching. M'malo mwa 3mil/3mil, gwiritsani ntchito 4mil/4mil kapena zazikulu pa ma laminate amphamvu kwambiri kuti apewe kuwonongeka kwa kabudula, kutseguka, kapena kutsata.

Kutumiza Zizindikiro Moyenera

Kuyendetsa bwino kwa zizindikiro zothamanga kwambiri kuyenera kukhala:

• Mwachindunji komanso mwachidule (kuchepetsa kuchepa kwa chizindikiro)
• Kulekanitsidwa ndi dera la pafupipafupi (kuletsa kulankhulana mopanda kukayikirana)
• Yovomerezeka poyesa (ndi mapepala oyesera omwe akupezeka mosavuta)

Izi zimakula bwino umphumphu wa chizindikiro, zothandizira kuyesa kupanga, ndipo amaletsa zolakwika pakugwira ntchito panthawi yogwiritsa ntchito.

2. Kapangidwe ka Stackup: Kulinganiza Zofunikira Zamagetsi ndi Zopanga

Kuwerengera Magawo ndi Kusankha Zinthu

• Zigawo zina = kulekanitsa bwino chizindikiro/mphamvu, koma mtengo ndi chiopsezo ndizokwera
• Zigawo zochepa kwambiri = Kuwongolera koyipa kwa EMI, njira yolumikizirana yolakwika

Pa ntchito zovuta za RF monga 5G, Zigawo 10+ ndi zofala. Rogers RO4350B Ndi chisankho chodziwika bwino pa zosowa zochepa za Dr/Df, koma chimafuna kuwongolera kolimba pakugwiritsa ntchito.

Langizo la UinjiniyaSankhani ma laminate osati kokha kuti agwire ntchito bwino komanso kuti agwire ntchito bwino. kuthekera kwa makina, khalidwe logwirizanandi kukhazikika kwa kutentha panthawi ya lamination.

Zoganizira za Njira Yothira Mafuta

Ma PCB a Multilayer RF amafunika kuwongolera bwino:

• Kulondola kwa kulembetsa (± 50μm)
• Kukanikiza magawo: 180–220°C, 5–10MPa, mphindi 30–60 kutengera kukonzekera bwino ndi mulingo wa mkuwa

Kukonza bwino ma stackup ayenera kulinganiza kugawa kwa dielectric ndi kusinthasintha kwa mkuwa kuonetsetsa kuti lamination ndi yofanana komanso kupewa kupotoza kapena kusokoneza.

3. Kapangidwe ka Via ndi Pad: Kugwirizana ndi Kuthekera kwa Njira

Kudzera Mtundu ndi Kubowola Kukula

• Mabowo odutsa zosavuta kupanga koma zimayambitsa ma parasitic
• Ma vias osawona ndi obisika kuchepetsa kusokoneza kwa chizindikiro koma kumawonjezera mtengo ndi zovuta

Malangizo a KapangidweGwiritsani ntchito mitundu yoyenera bandwidth yanu ya chizindikiro ndi kulekerera kwanu. Pewani dayamita yocheperapo kuposa 0.2 mm, chifukwa zimavuta kuboola ndi kuyika ma plating.

Kapangidwe ka Pad kuti Solder Ikhale Yodalirika

• Onetsetsani kuti ma pad akugwirizana chizindikiro cha zinthu zina ndi mbiri yobwerera m'mbuyo
• Kuti muwonjezere mphamvu: konzani kukula kwa ma pad kuti agwirizane ndi kayendedwe ka solder
• Kwa solder ya mafunde: yambitsani ngalande yothira madzi yokhala ndi mawonekedwe oyenera a pad/kapangidwe

Kupewa mavuto a solderingGanizirani za ENIG kapena OSP yosankhidwa kuti igwiritsidwe ntchito pafupipafupi. Pewani ma pad osungunuka kapena osapakidwa bwino omwe angayambitse kuponya miyala pamanda, kulumikizanakapena malo ozizira.

4. Zolakwika Zofala ndi Mayankho a Uinjiniya

Zolakwika za Mzere

• Zizindikiro: Kutsegula kwa trace, kabudula, kapena m'lifupi mwake mosagwirizana
• Zimayambitsa: Mizere yopyapyala kwambiri, kuwongolera kolakwika kwa etch, kuboola molakwika
• Mayankho:
• Gwiritsani ntchito zosungira ma geometries ochezeka ndi utoto
• Yang'anirani chemistry yokongola komanso kukonzekera pamwamba pa PCB
• Linganizani makina obowolera ndikuwona kuwonongeka kwa bit

Nkhani Zogwirizanitsa Magawo

• Zizindikiro: Delamination, kabudula wamkati
• Zimayambitsa: Kuthamanga/kutentha koipa kwa lamination kapena kusakhazikika bwino
• Mayankho:
• Sankhani zokonzekera zosagwira chinyezi
• Gwiritsani ntchito makina olinganiza bwino kwambiri
• Kapangidwe kokwanira mipata yolumikizirana

Ziphuphu za Via ndi Pad

• Zizindikiro: Ma vias otsekedwa, ma plating ofooka, kukweza ma pad kapena okosijeni
• Zimayambitsa: Zinyalala zobowola, mankhwala osayenera ophimba, kusakwanira kuyika ma pad
• Mayankho:
• Limbikitsani kuyeretsa pambuyo pobowola
• Sungani pulasitiki yosambira ndi magawo ake
• Konzani mawonekedwe a pedi ndikugwiritsa ntchito phukusi loletsa okosijeni

Kutseka Kusiyana: Kapangidwe Kopangidwa Kumapereka Phindu

Makampani omwe amagulitsa Mfundo za DFM Kupanga kwa RF PCB nthawi zonse kumaposa mpikisano wawo:

• Kupambana kwakukulu kwa kupatsidwa koyamba
• Kusintha pang'ono kapena kusintha kapangidwe
• Kudalirika kwabwino kwa nthawi yayitali
• Kuchepetsa madandaulo a makasitomala ndi ndalama zolipirira chitsimikizo

Mosiyana ndi zimenezi, kunyalanyaza kupanga zinthu kumabweretsa kuchedwa kwa kupanga, kukolola pang'ono, komanso khalidwe losakhazikika la zinthu—makamaka m'madera ndege, zachipatalakapena zamagetsi zodzitetezera, komwe kulephera si njira ina.

Chifukwa Chake Rich Full Joy Ndi Mnzanu Wabwino wa RF PCB

Pa Chimwemwe Chochuluka, timachita zinthu zoposa kapangidwe kake—timakonza zinthu kupambana pakupangaAkatswiri athu amamvetsetsa momwe ma PCB amphamvu kwambiri amagwirira ntchito, kuyambira njira zabwino za DFM mpaka kukonza zinthu za RF zapamwamba.

• Kukonzekera bwino kwa mapangidwe a mapulogalamu a RF
• Kuyerekezera kwa Stackup ndi chitsanzo cha impedance
• Kutsimikizira kapangidwe kake ndi njira yopangira
• Mapangidwe opangidwa bwino omwe amathandizidwa ndi zaka zambiri zaukadaulo wopanga ma RF

Khulupirirani Wolemera Chisangalalo Chonse kukuthandizani kupanga yoyendetsedwa ndi magwiridwe antchito, yotsika mtengondi yopangidwa kwambiri Ma PCB a RF—opangidwa kuchokera ku lingaliro mpaka pansi popanga.