Yub me PCBA pol kare cako ki mako cal, ma lubo ki Keto PCB, kit ma ki cwalo kwede, DRC (Design Rule Check), ki DFM Check, ki dong okati woko Gerber Files, NC Drill Files, BOM (Bill of Materials), ki Goyo cal me ribbe. Pi yub ma tek, HDI PCB diro manyen ki laser-drilled microvias ki lamination ma lubo kor twero bedo gin ma mite.

Jami ma ki keto iye tye:

• Netlist
• goyo cal ki cuma
• karatac me ngec ma mako jami ma tye iye
• Karatac me kero me tic (lac ma nok loyo/kin ma ki keto iye, dit pa bur ma nok loyo, lac pa dam ma ki lwongo ni solder mask, gin ma mite me gwoko impedance)

Gin ma pire tek ma ki coyo tye iye:

• Gerber RS-274X keje ODB++
• NC Drill File
• Yer ki Ket karatac ni
• Stencil Gerber
• Ripot me kabedo me temo
• Cokke me goyo cal ki gin ma ki lwongo ni Silkscreen

2.1 Cik me keto dano

Keto jami obedo guti me yub pa PCBA ki gudo Ber pa cwalo lok, Tic pa lyeto, ki Kit me yubu jami. Keto ne maber pire tek pi impedance control PCB yub ki jami ma ki lwongo ni digital circuits.

• Poko jami ma tiyo: Pok jami ma ki lwongo ni analog, digital, power, ki high-speed interface interface me gengo peko.
• Mot pa lanyut: Ket jami ni i yoo ma lanyut ni tye ka mol iye me dwoko piny rwom me rwate ki rwom me loop.
• Gin ma pire tek ma pire tek: Ket MCU/FPGA/SoC, DDR, cawa, ki jami ma miyo teko mukwongo.
• Keto i nget: Jami ma kubu, bute, ki LED ma tye cok ki dog board me cobo peko me tic.
• Kit me lyeto: Jami ma tiyo ki teko madwong ma tye cok ki yoo ma lyeto kato iye onyo kama ki keto iye lyeto; med thermal via arrays i te jami ma lyet.

2.2 Kit me cwalo yoo ma pirgi tek

• Lubu lac & kero me kare ni: 0.5 mm lac pa 1 oz copper tero 1 A. Pi teko ma malo, tii ki copper pi onyo pek pa copper ma pek.
• Gin aryo ma pat pat: USB, HDMI, LVDS, Ethernet mito rom pa borre, Kabedo ma rom, ki Kubbe matek me gwoko kit ma lanyut tye kwede ki dwoko piny rwenyo keto ki dwoko gin ma orwenyo.
• Impedance ma ki gwoko: Cik ma ki cwalo oyotoyot mito rwom me impedance ma ki kwano ki i kom jami ma ki keto i wigi; wel ma rwate tye 50 Ω ma tye ki agiki acel ki 100 Ω ma pat pat. Neno lok ma mako gedo omyera obed ki juku rwom me tic moko.
• Yo me dwogo cen: Neno ni jami ma ki keto me neno ni tye maber me gengo peko me poko jami ma ki lwongo ni EMI; med yoo me tweyo cok ki dul ma ki loko iye.
• Ni beo: dwoko piny rwom me ngwec ma malo; tic ki Bolo piny keje Blind/Buried Vias ka mitte. Pi yubu HDI, tii ki vias ma ki keto kacel keje yoo ma ki poko gii kacel ki pongo ki copper.

DFM ma goro kelo Solder Bridging, Goyo kidi i lyel, Cold Solder Joints, loko jami, ki Odilo ma ki lwongo ni Solder. Kwano DFM ma peya ki yubu madwong konyo me gwoko gin ma ki nongo mukwongo.

3.1 Yub me ngom

Kit ma ngom tye kwede omyera obed ma rwate ki IPC-7351. Kit ma ki yubu kwede pad maber pire tek pi bedo maber PCB assembly ki PCBA assembly.

• CHIP Components (0402, 0603, 0805): Kit pa pad omyera orwate ki stencil aperture ki reflow profile me gengo tombstoning.
• QFN (Quad Flat No-lead): piny Thermal Pad omyera ki poko ne me dwoko piny pii ki ngiico; tic ki gin ma ki lwongo ni solder mask defined (SMD) keje non-solder mask defined (NSMD) pads maber.
• BGA (Ball Grid Array): Lat pa gin ma ki lwongo ni pad pol kare tye 80-85% pa lac pa gin ma ki lwongo ni ball; yabo bongo ma ki lwongo ni solder mask omyera obed maber me gengo solder mask i kom gin ma ki lwongo ni solder mask. Pi BGA ma tye ki dwan maber, tii ki gin ma ki lwongo ni solder mask dam lac ≤0.1 mm onyo kwanyo dam ka mitte.
• SOT/SOP/QFP: Pitch maber mito lac pa dam ma oromo me gengo rwate.

3.2 Poko kin jami ki kit ma ki keto kwede

• Kabedo ma ki keto iye jami ma tye cok omyera orwate ki jami ma miite me kwanyo ki keto iye ki tic kwede odoco (≥0.3 mm).
• Ket jami ma rom aroma i yoo acel wek neno AOI obed yot.
• Gwok bor ma oromo i kin jami mabor ki matino me gengo peko me tipu i kare me dwoko piny.

3.3 Gin ma ki lwongo ni Solder Mask & Silkscreen

• Solder Mask Dam lac ≥0.1 mm me gengo rwate.
• Silkscreen myero pe obed ka rwate ki pad; gwoko ≥0.2 mm ki kama bor.
• Lanyut me apoka poka, Pin 1 ma nyutu, ki ngat ma ki yero me tic kwede myero obed maleng.
• Yer kala me bongo ma ki lwongo ni solder mask (macol, bulu, macol, makwar, tar) malube ki miti pa lawil; nen ni coc ma ki coyo ni tye maber.

4.1 DFT

DFT miyo kare me temo PCBA maber, ma wel ne lapiny ki miiyo kony me yubu yub me temo ki yubu jami ma ki keto iye.

• Temo gin ma ki lwongo ni Flying Probe: Pe mitte gin mo; ber pi jami ma ki yubu ki dul ma nok.
• ICT (In-Circuit Test): Mito kabedo me temo ki jami ma ki keto; ber pi dwan malongo. Wa yubu kit ma ki temo kwede ki rwom ma oromo.
• FCT (Functional Circuit Test): moko tic pa PCBA kikome.
• Boundary Scan (JTAG): Tii ki jami ma ki yubu me temo gin ma ki lwongo ni chip me dwoko piny rwom me temo ma nen.

Gin ma mite pi DFT:

• Kabedo me temo lac ≥0.8 mm, ki bor ≥1.27 mm.
• Pok kabedo me temo i dul acel ka twere.
• Gwok kabedo me temo ma pe ki gengo ki mabor ki jami mabor.
• Gwok kabedo me temo teko ki jami ma tye i ngom wek owek temo mac manok ki pimo teko pa mac.

4.2 DFA

DFA keto tam ne i kom tic maber ki gengo peko.

• poko kin dano: Tic ki V-cut (V-Scoring) keje Kac pa oyoo / Bur ma ki keto iye cim. Pi pcb assembly ki jami ma ki keto i nget, tic ki yoo me tab ki kac pa oyoo.
• Tooling Rail: 3-5 mm lac pi tero gin ma ki cwalo ki keto ne.
• Fiducial Mark: Ma romo 2-3 global fiducials; jami ma ki keto i kabedo moni pi jami ma ki lwongo ni fine-pitch devices calo BGA ki QFN.
• Poka-Yoke: Nen ni jami ma gikubbe tye ki rwom ma pat pat me gengo keto jami ma rwate.

5.1 Kit ma lanyut tye kwede (SI)

lok ma mako SI tye iye Tamo ma tut lacen, Lok i kin dano, Kato, Undershoot, ki Cawa ma ki loko. Madwir kit ma ki yubu kwede PCB twero tic ki yub me yub ma peya ki yubu ki moko lok ma lubo kit ma ki yubu kwede me temo cal wang.

• rwate pa impedance: Gin ma ki lwongo ni Source series termination, parallel termination, onyo AC termination.
• rom pa borre: Serpentine routing pi DDR data/address groups ki differential pairs.
• Gengo lok ma ki loko i kin dano: 3W rule (spacing ≥3× trace width); medo jami ma gwoko pi lanyut ma pire tek.
• Dwogo ki: Med jami ma ki tiyo kwede me tweyo macok ki dul ma ki loko me dwoko piny rwom me tic pa loop.

5.2 Kit me teko (PI)

Peko me PI tye iye Woo pa mac, Dwogo piny pa teko pa mac, ki Ground Bounce. ma ki yubu maber Dul ma poko teko (PDN) pire tek pi tic maber.

• Decoupling capacitor: Ket 0.1 μF + 10 μF ma ki rubu kacel cok ki gin acel acel ma miyo teko; tic ki low-ESL capacitors pi poko rwom ma malo.
• Power Plane Split: poko gin ma ki lwongo ni analog ki digital power planes; gwokke ki ngolo kama opokke ki lanyut ma tye ka ngwec matek.
• Yo ma rwom ne lapiny: Teko ma tye cok ki yamo ma tye i ngom gi yubu rwom me yamo; gwoko dielectric ma tidi i kin teko ki ngom.
• Ki i kwano: Parallel multiple vias for high-current paths; tic ki yoo ma ki pongo ki copper pi jami ma tiyo ki teko madwong.

5.3 EMC (Electromagnetic Compatibility)

EMC kwako EMI (Electromagnetic Interference) ki EMS (Electromagnetic Susceptibility). Neno pa EMC ma peya ki lubu cik twero nyutu peko ma twero bino ma peya ki temo ne.

• Cik me 20H: Cwalo dul ma ki lwongo ni power plane ki 20× layer spacing me dwoko piny fringing fields.
• Yub me tic ki jami ma pat pat: Medo TVS, common mode chokes, ferrite beads, ki capacitors i I/O connectors.
• Gwoko: Tii ki jami ma gwoko kom i kom kabedo ma goro; mino gin ma ki keto i ngom pi keto gin ma gwoko kom.
• Crystal & Clock: Pe ki keto yoo i te jami ma ki lwongo ni crystals; tii ki lanyut me gwoko ki gwoko lanyut me cawa ma cok.

5.4 HDI PCB Design

Pi yubu jami ma pek ne tek, HDI PCB diro manyen ki laser-drilled microvias, yoo ma pe nen, ki yoo ma ki yiko weko jami ma ki yubu ma nok ki rwom me tic ma malo. Jami ma pire tek:

• Microvia aspect ratio pol kare ≤1:1.
• Tic ki microvias ma ki keto kacel pi loko dul ma i kabedo ma dwong iye dano.
• Lamination ma lubo kor yub ni weko jami mapol ma ki lwongo ni microvia layers.
• Via-in-pad kacel ki pongo ki copper ki planarization pi BGA fanout.

6.1 BGA Design

Kit ma ki yubu kwede BGA pad ni gudo rwom me tic pa soldering pi PCB assembly ki PCBA assembly, tutwale i tic ma ki lwongo ni fine-pitch BGA.

• Diameter pa pad ≈0.8–0.85× ball diameter (e.g., 0.25 mm pad pi 0.3 mm ball).
• Gin ma ki lwongo ni Solder mask ma oyabe dit kato pad ki 0.025-0.05 mm tung acel acel.
• NSMD (Non-Solder Mask Defined) keje SMD (Solder Mask Defined); NSMD ma rwate pi BGA ma tye ki dwan maber.
• Fanout vias 0.2 mm/0.1 mm onyo ma nok loyo; tic ki Via-in-Pad kacel ki Copper Filled / Resin Filled me gengo jami ma ki lwongo ni solder wicking.
• Med lanyut me kabedo moni cok ki BGA pi keto ne maber.

6.2 QFN Design

QFN (Quad Flat No-lead) packages mito yubu thermal pad maber.

• Pok gin ma ki lwongo ni thermal pad i dul ma tiino mapol onyo tii ki gin acel ma tye ki dul ma ki poko me dwoko piny ka ma obale.
• Medo gin ma ki lwongo ni pin pads 0.2-0.3 mm ki i kom gin ma ki keto iye pi neno AOI.
• Tic ki keto gin ma ki lwongo ni resin plugging keje pongo copper pi thermal pad vias me gengo solder wicking.
• Pi QFN ma tye ki teko madwong, med lyeto kun wok ki i array kubu ki copper planes ma i iye.

6.3 0402 / 0201 / 01005 Jami matino tino

• 0402 pad spacing: 0.4–0.5 mm; 0201: 0.25–0.3 mm; 01005: 0.15–0.2 mm.
• Tii ki gin ma ki lwongo ni anti-solder ball stencil apertures (ma ki goyo onyo ma ki dwoko piny).
• Mii lanyut ma oromo pi keto ne maber.
• Tam pi keto glue pi yub ma tye ki dul aryo ki jami ma pek.

7.1 Yub me yabo gin ma ki lwongo ni Stencil

Kit ma ki yubu kwede stencil aperture moko coc ma ki lwongo ni solder paste printing rwom maber ki omyera ki yub maber pi PCBA acel acel.

• Pek pa stencil: 0.1–0.15 mm ma rwate; 0.08 mm pi jami ma tiino; 0.2 mm pi teko ma malo.
• Ratio me kabedo: Aperture area / aperture wall area > 0.66.
• Kit ma nen kwede: Aperture width / stencil thickness > 1.5.
• Yabo ma pire tek: QFN thermal pad multiple small windows; BGA ma rwate onyo ma rwate; gin ma ki lwongo ni anti-solder ball notched apertures for chip components.
• Tam pi gin ma ki lwongo ni step stencil pi jami ma ki rubu (me labolle, stencil ma pek pi kabedo ma tye ki mac madwong, ma tidi pi dwan ma tidi).

7.2 Reflow & Wave Soldering

• Reflow Soldering: Pi jami ma ki lwongo ni SMT; mito jami ma opore rwom me lyeto (medo lyeto, lwoko, dwoko piny, kweyo). Tic ki nitrogen dwogo cen pi yubu pii ki dwoko piny rwom me yamo.
• Wave Soldering: Pi jami ma ki lwongo ni through-hole (DIP) ki SMT red glue process.
• Selective Wave Soldering: Localized soldering for through-hole components; ber pi dul ma ki yubu ki diro ma pat pat.
• Kit me tic ma pe ki jami ma ki lwongo ni lead: SAC305 gin ma ki lwongo ni solder paste; rwom me lyeto ma malo 235-250 °C. Jami ma ki tiyo kwede me tyeko ngom tye iye HASL ma pe ki lead, YE, Dul ma miiyo kony me tic ki mac, ryal ma ki keto i pii, ki gin ma ki keto i pii.

7.3 Dul ma ki rubu

Rib SMT reflow ki DIP wave soldering, onyo tic ki Pin-in-Paste (PIP) pi jami ma tye i bur ma tye i reflow.

8.1 Yoo me poko kin dano

• V-cut (V-Scoring): wel ne lapiny; pi bao ma tye ki dul ma tye ki dul ma pe ki dul kom.
• Kac pa oyoo / Bur ma ki keto iye cim: Pi board ma pe rwate onyo jami ma tye i nget; tic ki yoo me tab kacel ki kac pa oyoo.
• Bridge + Mouse Bite: medo teko ki yot me poko kin jami.

8.2 Tooling Rail & Fiducial Mark

• Lac pa gin ma ki tiyo kwede: 3-5 mm.
• Lanyut me Fiducial: 1 mm diameter, 2-3 mm solder mask opening, gold onyo immersion tin finish.
• Local fiducials pi BGA/QFN fine-pitch devices.

8.3 Dit pa gin ma ki keto iye ki wel ne

• Dit pa gin ma ki lwongo ni panel i kin pick-and-place ki reflow oven limits (≤400 mm × 400 mm).
• Kit me tic maber ki jami ma ki tiyo kwede; gwokke ki balo.
• Tic ki breakaway tabs keje kabedo ma ki cwalo me dwoko piny par i kare me depaneling.

9.1 neno jami ma mako mac

• DRC pe ki bal mo ma twero neko dano.
• Labol ma pire tek ma rom ki bor pa gin ma ki cwalo, impedance, spacing.
• Guvu ma ki nongo ki i wel ki teko ma tye i kare ni.
• Temo kit ma lanyut tye kwede adwogi ne rwate ki gin ma mite i kom cal me wang.

9.2 DFM Check

• Kit pa pad ma lubu IPC-7351.
• Kabedo ma ki keto iye jami rwate ki jami ma miite me kwanyo ki keto ne.
• Gin ma ki lwongo ni Solder mask dam, silkscreen, polarity marking clear.
• Kabedo ma ki lwongo ni stencil aperture rwate ki area ratio.
• poko kin dano ki yoo me tic ki jami tic kumbedi.

9.3 DFT Check

• Temo rwom me rwom ma malo i kom jami ma pire tek.
• Kabedo me temo pe ki gengo.
• Kit ma jami me ICT tiyo kwede.

9.4 Kwedo yub

• Gin ma ki lwongo ni Tooling rail ki fiducial marks tye.
• Yoo me poko kin dano ni ber.
• Bor pa jami ki V-cut ≥0.5 mm.

9.5 Coc ma otum

• Gerber layer naming standardized.
• Namba me dul BOM, jami ma ki cwalo, wel ma tye kakare.
• Yer ki ket karatac ma rwate ki BOM.
• Karatac me stencil rwate ki kit ma ki yubu kwede PCB.

Pi jami macon onyo ma dong pe tiyo PCBA circuit boards, PCBA reverse engineering twero yubu gin ma ki lwongo ni schematics, BOM, ki Gerber files ki i board ma ki neno ki keto ngec ma ki nongo ni i kom gin manyen kit ma ki yubu kwede PCB ki PCBA assembly kit me tic.

Kit me loko jami ma wa tye kwede tye iye:

• Cal ma ki kwanyo ki i kom gin ma ki lwongo ni board ki X-ray me nyutu dul ma iye.
• Ngeyo jami ma tye iye ki kwanyo BOM medo ki jami ma ki loko ma dong oti woko.
• mako cal ki i yub me netlist.
• PCB layout recreation ki medo rom pa DFM.
• Kit ma ki yubu kwede PCBA ki temo tic.

Tic mukene ma medo wel:

• Kit ma ki umu kwede pi kabedo ma tek.
• Keto ki keto i poto pi gengo yeng yeng.
• Pong piny pi BGA ki CSP ma ki keto.
• Tic odoco ki yubu tic ki BGA rework station.
• Yub me temo tic pi PCBA ma ki yubu piri keni.