0102030405
Tataiso ea Moralo oa PCB e Flex (2025): Tataiso ea Litsebi ea ho Kobeha, ho Kopanya le Lisebelisoa
2025-07-03
E entsoe bakeng sa Tšepahala ho Ditshebediso tse Fetohang
Temohisiso ea Bohlokoa: 78% ea ho hloleha ha PCB e kobehileng ho bakoa ke litlolo tsa radius ea kobeho (data ea ts'epo ea IPC). Tataiso ena e fana ka litharollo tsa boemo ba boenjiniere bakeng sa lits'ebetso tsa bohlokoa tsa sepheo.
1. Ho Tseba ho Kobeha ha PCB e Flex: Melao ea Moralo o sa Fetoheng khahlanong le o Fetohang
Phapang e Bohlokoa
- E sa fetoheng (E kobeha ho kenya): Nako ea bophelo bohle ea ho kobeha e ka tlase ho 100 (mohlala, li-implant tsa bongaka)
- Matla (Ho Flexa ho Tswelang Pele): Lipotoloho tse ka holimo ho 100,000 (mohlala, manonyeletso a liroboto)
Lipalo tsa Radius tse Kobehileng (Ka IPC-2223)
| Mealo | Botenya bohle (mm) | Radius e Nyenyane e sa Fetoheng | Radius e Nyenyane e Matla |
|---|---|---|---|
| 1 | 0.15 | 1.5mm (karolelano ea 10:1) | 15mm (karolelano ea 100:1) |
| 2 | 0.25 | 2.5mm | 37.5mm |
| 4+ | 0.50 | 10mm (karolelano ea 20:1) | Ha e Khothaletsoe |
Litlhoko tsa Moralo
- Tsela ea ho Latela Morao: Kamehla e otlolohile ho kobeha (90°=kotsi ea ho hloleha↑ 300%)
- Ntlafatso ea Axis e sa Lekaneng: Beha mesaletsa e ka tlase ho 10mil sebakeng se sa nke lehlakore sa mechini
- Kalafo ea Koporo: Sebelisa koporo e phuthiloeng e nang le annealed (ductility > electrodepositioned)
- Qoba Libakeng Tse Kobehileng: Li-vias tsa PTH, likarolo, likhutlo tsa 90°
⚠️ Bohlokoa: Litlolo tsa radius ea kobeho li etsa 78% ea liphoso tsa tšimo. Kamehla kenyelletsa 20% ea phaello ea polokeho ho feta bonyane ba IPC.
2. Saense ea Lintho: Polyimide khahlanong le FR4 Performance Matrix
Papiso ea Thepa ea Dielectric
| Thepa | FR4 (E tiileng) | Polyimide (Flex) | Tšusumetso Moralong |
|---|---|---|---|
| Dkt @ 1GHz | 4.5 | 3.2 | Tahlehelo e tlase ea lets'oao |
| Tg (°C) | 130-180 | >250 | Botsitso bo phahameng ba mocheso |
| CTE (ppm/°C) | 14-18 | 12-15 | Ho sotha ho fokotsehileng |
| Ho Monya Mongobo | 0.8% | 2.8% | E hloka ho besoa esale pele |
Tataiso ea Khetho ea Koporo
- Flex e Fetohang: Cu e phutholohileng e nang le annealed (bolelele >15%)
- Maqhubu a Phahameng: Foil e phekotsoeng morao e sa hlahellang hantle
- Motlakase o Phahameng: Koporo ea 2oz+ e nang le matlafatso ea polyimide
3. Sebopeho le Tsela: Mekhoa e Tsoetseng Pele
Ka Protokhole ea Moralo
- Libaka tsa Kobeho: Ha ho na li-vias tse ka har'a botenya ba boto ba 3x ba mola o kobehileng
- Li-Microvia tse sa tsitsang: Sebelisa li-vias tsa laser tsa 0.1mm libakeng tse nang le bongata bo boholo
- Li-Spurs tse tšehetsang: Kenya marotholi a meokho likotong tsa trace-pad (khatello ea maikutlo↓ 40%)
Mokhoa oa Taolo ea Impedance
# Foromo ea Stripline Impedance (IPC-2141A) Z₀ = (87/√(εᵣ+1.41)) * ln(5.98H/(0.8W+T)) # Moo: # H = botenya ba dielectric # W = bophara ba mohlala # T = botenya ba mohlala # εᵣ = kamehla ea dielectricLikhetho tsa ho Sireletsa ka EMI
| Mofuta | Katleho | Ho tenyetseha | Litšenyehelo |
|---|---|---|---|
| Koporo e Tiileng | ★★★★☆ | ★☆☆☆☆ | Holimo |
| Sefapano sa ho Hlaha (60%) | ★★★☆☆ | ★★★★☆ | Mahareng |
| Epoxy ea Silevera | ★★☆☆☆ | ★★★★★ | Tlase |
4. Moralo oa Stackup: Litlhophiso tse 4 tsa Bohlokoa
Stackup e Tiileng e Flex e Tšepahalang Haholo
Holimo ho Tiile (FR4): Likarolo ↓ Prepreg Flex Core (25μm PI + 18μm Cu) ↑ Prepreg Botlaaseng bo Tiile (FR4): Lihokelo Kaho e leka-lekaneng e thibela ho kobeha (ho se tshwane ha CTE
Mokhoa oa ho kopanya libuka
- E nolofalletsa ho kobeha ha 180° ka mokhoa oa multilayer flex
- Karohano ea lera: Likheo tsa moea tsa 0.1mm
- Tefiso ea theko: 35-40%
Thuto ea Nyeoe e Laoloang ke Impedance
- Bothata: Para e fapaneng ea 100Ω ka mokhoa oa ho tenyetseha oa mekhahlelo e 4
- Tharollo:
- Mealo ea matšoao: mesaletsa ea 0.1mm
- Dielectric: 50μm polyimide (εᵣ=3.2)
- Karohano ea sefofane sa fatše: 0.2mm
- Sephetho: ± 7% mamello e fihlelletsweng
5. Moralo oa ho Latela Melao ea IPC
Maemo a Tsamaiso
kerafo TD A[IPC-2221] --> B[Moralo o Tloaelehileng] A --> C[IPC-2223] --> D[Flex/Rigid-Flex] D --> E[Lisebelisoa] D --> F[Sebaka sa Mokhanni] D --> G[Litekanyetso tsa Kobeho] H[IPC-6013] --> I[Liteko tsa Litšoaneleho] I --> J[Thermal Cycling] I --> K[Kobeho ea Mamello] Mekhoa ea Teko ea Bohlokoa
- Flex e Fetohang: Lipotoloho tse 10,000 @ radius ea 20mm (IPC-TM-650 2.4.3)
- Tšabo ea Thermal: -55°C ↔ 125°C, lipotoloho tse 100 (JESD22-A104)
- Tšilafalo ea Ionic:
6. Bakhanni ba Litšenyehelo le Nako
Matrix ea ho rarahana ha tlhahiso
| Ntlha | Tšusumetso ea Litšenyehelo | Tšusumetso ea Nako ea Kena |
|---|---|---|
| Palo ea Mealo >6 | + 40-60% | +5 matsatsi |
| E thata ho feta 4/4mil | + 25% | +3 matsatsi |
| Impedance e laoloang | + 15-20% | +Matsatsi a 2 |
| Setifikeiti sa Sesole | + 100% | +Matsatsi a 14 |
Leano la ho Fokotsa Nako ea Pele
- Sebelisa botenya bo tloaelehileng ba polyimide (25μm/50μm)
- Qoba menyetla ea ho koahela lintho ka mokhoa o ikhethileng
- Fana ka mehlala ea impedance esale pele
7. Lenane la Tlhahlobo la Khetho ea Moetsi
Tlhahlobo ea Morekisi oa Lintlha tse 20
- Setifikeiti sa IPC-6013 Sehlopha sa 3
- Setoko sa koporo se phuthiloeng se nang le annealed
- Bokhoni ba ho cheka ka laser (
- Teko ea impedance ka TDR
- Lisebelisoa tsa teko ea flex e matla
- Kopano ea kamore ea ho hloekisa (Sehlopha sa 8)
- Likhetho tsa ho tiisa tse tsamaellanang le CTE
- Laboratori ea tlhahlobo ea ho hloleha sebakeng seo
✦ Letšoao la Indasteri: Bahlahisi ba ka sehloohong ba fihlella sekhahla sa sekoli sa
Lisebelisoa tsa Moralo tse Kopanetsoeng
Sekhalkhuleita sa Radius se Kobehileng
Rmotsotso = K × (Palo ea Mealo)1.5 × Botenya Bohle
Moo K=12 (e sa fetoheng) kapa 120 (e fetohang)
Nomograph ea Bophara ba Mokhanni
Hlahloba Haholoanyane ka Moralo le Tlhahiso ea PCB e Flex
- ·Litšebeletso tsa Tlhahiso le Kopano ea PCB e Flex – Kakaretso e felletseng ea ts'ebetso ea tlhahiso le bokhoni.
- ·Tataiso ea Moralo oa PCB e Flex - Mekhoa e metle ea ho hlophisa, ho bokella le ho laola impedance.
- ·Lintlha tsa Litšenyehelo le Khoteshene tse Fetotsoeng tsa PCB - Utloisisa lintho tse bakang litšenyehelo le mokhoa oa ho ntlafatsa tekanyetso ea hau.
- ·Khetho ea Lintho tse Flex PCB – Temohisiso mabapi le LCP, PI, mefuta ea sekhomaretsi le lifoile tsa koporo.
- ·PCB e Flex vs Rigid-Flex: Ke Efe eo U ka e Khethang? – Papiso ea tekheniki le litšenyehelo bakeng sa ho etsa liqeto tse betere.
🌐 Lisebelisoa tse Tšepahalang le Maemo a Indasteri
- ·Maemo a IEEE bakeng sa Moralo oa PCB o Potlakileng – Referense bakeng sa botšepehi ba lets'oao le litataiso tsa impedance.
- ·Tekanyetso ea IPC-6013 bakeng sa Lipotoloho tse Tenyetsehang – Litlhokahalo tsa ho tšoaneleha le ho amoheloa bakeng sa lipotoloho tse tenyetsehang.
- ·Patlisiso ea 'Maraka oa Prismark – Ponelopele le temohisiso mabapi le 'maraka oa lisebelisoa tsa elektroniki tse tenyetsehang.
0102