Uburyo bwo kumenya PCB nziza: Ubuyobozi bwuzuye bwo kugenzura

I. Igenzura ry'icyiciro cy'igishushanyo (DFM/DFA)

Intego y'ingenzi: Garagaza amakosa yo mu gishushanyo mbere y'igihe kugira ngo ugabanye ibyago byo kuvugurura umusaruro.

1. Igenzura ry'imiterere y'amashanyarazi

• Guhuza Impedance: Imiterere idasanzwe y'imirongo yo kohereza ibimenyetso byihuse (urugero, USB, HDMI, imirongo ya RF) igomba kuzuza ibisabwa mu gishushanyo (urugero, 50Ω imwe ifite iherezo, 90Ω itandukanye). Ibikoresho byo kwigana SI (urugero, HyperLynx) bikoreshwa kugira ngo hirindwe kurengerwa kw'ibimenyetso no kugabanuka kw'ingufu.
• Ubunyangamugayo bw'ikimenyetso: Genzura niba hari uburyo bwo kuvugana hagati y’amajwi, gutinda, no gukoresha imbaraga (PI) kugira ngo urebe neza ko ibimenyetso bikoresha imbaraga nyinshi nta nkomyi bibangamirana. Komeza guhuza neza ingufu/ubutaka kugira ngo ugabanye imirasire ya EMI.
• Igishushanyo mbonera cy'urutonde rw'ibice: Emeza ubugari bw'urwego rw'ubushyuhe, umubare w'urwego rw'umuringa, n'uburyo bwo gushyira hamwe kugira ngo ubushyuhe bushobore gushonga no kugenzura impedance, byujuje ibisabwa na EMC.

2. Igenzura ry'amategeko agenga imikorere (DFM)

• Ibipimo byo gukurikirana: Ubugari/intera ntoya y'aho ibintu biherereye ni ≥3mil (1mil kuri HDI), ikiraro cya maske yo gusoda ≥4mil.
• Umwanya w'umwobo n'agapira: Bisabwa gukoresha 0.3mm, pad 0.6mm kugira ngo hirindwe ko imashini itembera cyangwa ko icika.
• Igishushanyo cy'ubunini bw'umuringa: Ingufu zikoresha 1oz–2oz (35–70μm) kugira ngo zihuze n’umutwaro w’amashanyarazi kandi zirinde ubushyuhe bwinshi.

3. Uburyo bwo guhuza imiterere ya mekanike

• Imiterere, imyobo, n'imyanya bihura n'ubushobozi bwo gufunga (± 0.1mm).
• Ibice bikoresha ubushyuhe bitandukanye n'ibice bitanga ubushyuhe bifite inzira zo guhumeka.
• Ibimenyetso bya polarity bigomba kuba bisobanutse neza kuri capacitors na ICs.

II. Gukurikirana Ubwiza bw'Umusaruro mu Musaruro

Intego y'ingenzi: Kugenzura mu buryo nyabwo ihinduka ry'imikorere kugira ngo harebwe ko iyubahirizwa ry'amategeko.

1. Igenzura ry'ibice n'ibikoresho

• Genzura ubwoko bw'ibikoresho (FR-4, Rogers, PI), ubunini (± 5%), n'ubukonje bw'umuringa.
• Ubuso bugomba kuba budafite imishwanyaguro, nta ogisijeni ihari, nta gucikamo ibice.

2. Uburyo bwo gucukura no gukoresha inzira

• Ubuziranenge bw'umurambararo w'umwobo: Ubwihangane ± 5%, isukura inkuta z'imyobo, nta mbobo cyangwa smear.
• Gutunganya Ibyuma mu Myobo: Umuringa udafite amashanyarazi ≥0.5μm, umuringa upfundikiye ≥20μm (IPC-6012 Class 3).

3. Gushushanya no Gushushanya

• Gutandukana kw'iyandikisha ≤5mil, ubugari bw'ibice bimwe, umuringa usigaye ≤1%.
• Silkscreen irasobanutse, ifite uburebure bwa ≤10ml, ifite ubushobozi bwo gufata neza.

4. Igenzura ry'irangira ry'ubuso

• NDEMERA: Nickel 3–5μm, zahabu 0.05–0.1μm, nta gatambaro k'umukara.
• Ishami rishinzwe kuzimya umuriro ry’abakorerabushake: Igipfundikizo 0.2–0.5μm, umwanda wa iyoni ≤1.56μg/cm².
• HASL: Ubunini ≥2.5μm, ubuso bworoshye, ≥95% by'ubushyuhe buvanze n'amazi.

5. Kugenzura Lamination na Impedance

• Gutandukana kw'iyandikisha ≤10mil, ubunini bwa dielectric bungana, nta bibuno cyangwa delamination.
• Impedance y'ikimenyetso cy'ingenzi iri hagati ya ± 10%, byemejwe na TDR.

III. Isuzuma ry'imikorere n'ubwizerwe by'ibicuruzwa byarangiye

Intego y'ingenzi: Kugenzura imikorere y'amashanyarazi ya PCB no kudatezuka ku gihe kirekire.

1. Isuzuma ry'imikorere y'amashanyarazi

• Gukomeza ≤5mΩ, ubushyuhe ≥10⁹Ω @500V DC.
• Gerageza igihombo cyo gushyiramo (≤3dB @5GHz) n'igihombo cyo kugarura ku miterere yihuta cyane.

2. Isuzuma ry'ubwizerwe

• Ihungabana ry'Ubushyuhe: Ubushyuhe bwa 260°C, kwibira mu mazi mu gihe cya sekondi 10, nta gucika cyangwa ngo habeho udusebe.
• Ubushobozi bwo kwihanganira Dielectric: 500V DC mu gihe cy'umunota 1, nta gucikagurika.
• Ubushobozi bwo kugurisha: 245°C mu gihe cy'amasegonda 3–5, ≥95% bitose.

3. Igenzura ry'ibigaragara n'ibipimo

• AOI yo gukoresha imiyoboro migufi/ifunguye, agapfukamunwa gasoda, ogisijeni.
• Imiterere ± 0.1mm, umwobo ± 0.05mm, ubugari bwa lamination ≤ ± 10%.

4. Isuzumabumenyi ry’imiterere y’inyubako rigezweho

• Ubunini bw'igipfunyika: XRF kugira ngo igenzure imiterere y'umuringa n'izahabu/nikeli.
• Igice cyambukiranya: Igenzura ry'amatara rireba ubugari bw'urwego, gufatana, n'uburyo icyuma gishyirwa ku rukuta gifite umwobo.

IV. Isuzuma ryihariye ry'inyongera

1. PCB zikoresha ikoranabuhanga ryihuta cyane/rifite umuvuduko mwinshi

• Isesengura ry'umuyoboro wa interineti kuri S-parameters: igihombo cy'ikimenyetso ≤3dB @ ≥5GHz, ikosa rya impedance ≤±8%.

2. PCB zoroshye/zikomeye-zihindagurika

• Ikizamini cyo kunama: Ingendo 100.000 @ R≤2mm, nta mivuniko.
• Imbaraga za mekanike: Nta gucikamo ibice ahantu hakomeye.

3. PCB zo mu rwego rw'imodoka/ubuvuzi/ikirere

• Ifite ubushobozi bwo kurwanya umuriro wa IPC-A-600 Class 3, UL, RoHS/REACH, V-0.

V. Ibikoresho byo kugenzura n'amahame ngenderwaho y'inganda