Double sided pcb Normal pcb Lead free HASL Counterbore Manufacturer | YMS PCB
HAL(Lead Free), the full name is Hot Air leveling with Lead Free. Compared with HASL, the main difference for HAL(Lead Free) is the element of material which do not contain Lead(Pb), so it’s RoHS Compliant and it’s much more popular and widely used in PCB kev tsim .
HAL(Lead Free) requires higher run temperatures for lead free solder and longer contact time, the production cost for HAL(Lead Free) is slightly higher than HASL(Tin/Lead).
The manufacturing process of HAL(Lead Free) is similar to HASL(Tin/Lead), the circuit boards will be submersed in molten solder(Lead Free). This solder will cover all the exposed copper surfaces. Upon retraction from the solder, high pressure hot air is blown over the surface through air knives, this levels the solder deposit and removes the excess solder from the surface of printed circuit boards.
Luam Tawm Hauv Circuit Board Kev Taw Qhia
Ib txwm luam tawm Circuit Board: Most PCBs for simple electronics are simple and composed of only a single layer. More sophisticated hardware such as computer graphics cards or motherboards can have 2 or multiple layers, sometimes up to twelve.
A printed circuit board (PCB) mechanically supports and electrically connects electrical or electronic components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductive substrate. Components are generally soldered onto the PCB to both electrically connect and mechanically fasten them to it.PCBs can be single-sided (one copper layer), double-sided (two copper layers on both sides of one substrate layer), or multi-layer (outer and inner layers of copper, alternating with layers of substrate). Multi-layer PCBs allow for much higher component density, because circuit traces on the inner layers would otherwise take up surface space between components. The rise in popularity of multilayer PCBs with more than two, and especially with more than four, copper planes was concurrent with the adoption of surface mount technology.
What is the difference between a Countersink and a Counterbore?
YMS Yooj yim PCB tsim muaj peev xwm:
| YMS Nus PCB tsim muaj peev txheej saib xyuas dua | ||
| Ntseg | muaj peev xwm | |
| Txheej Txheej | 1-60 hli | |
| Muaj Cov Qauv PCB Uas Siv Tau Los Ua | Los ntawm qhov nrog Aspect Ratio 16: 1 | |
| faus thiab dig muag ntawm | ||
| Lub Tshoob | Loj Cov Khoom Siv xws li RO4350B thiab FR4 Mix thiab lwm yam. | |
| Cov Khoom Siv Kub Ceev xws li M7NE thiab FR4 Mix thiab lwm yam. | ||
| Cov khoom siv | CEM- | CEM-1; CEM-2 ； CEM-4 ； CEM-5.etc |
| FR4 | EM827, 370HR, S1000-2, IT180A, IT158, S1000 / S1155, R1566W, EM285, TU862HF, NP170G thiab lwm yam. | |
| Kev kub ceev | Megtron6, Megtron4, Megtron7, TU872SLK, FR408HR, N4000-13 Series, MW4000, MW2000, TU933 thiab lwm yam. | |
| High Zaus | Ro3003, Ro3006, Ro4350B, Ro4360G2, Ro4835, CLTE, Genclad, RF35, FastRise27 thiab lwm yam. | |
| Lwm tus | Polyimide, Tk, LCP, BT, C-ply, Fradflex, Omega, ZBC2000, PEEK, PTFE, ceramic-based thiab lwm yam. | |
| Thickness | 0.3 hli-8 hli | |
| Max. tooj liab Thickness | 10 ZOS | |
| Yam tsawg kawg kab Dav thiab qhov chaw | 0.05mm / 0.05mm (2mil / 2mil) | |
| BGA CHAW | 0.35 hli | |
| Min mechanical Drilled Qhov Coob | 0.15 hli (6mil) | |
| Saib tus ntsuas rau ntawm lub qhov | 16 ： 1 | |
| Nto xaus | HASL, Lead dawb HASL, ENIG, Immersion Tin, OSP, Immersion Silver, Gold Finger, Electroplating Hard Kub, Xaiv OSP ， ENEPIG.etc. | |
| Ntawm Cov Kev Xaiv Sau | Qhov ntawm yog plated thiab tau sau nrog nrog conductive lossis tsis-conductive epoxy ces capped thiab plated dhau (VIPPO) | |
| Tooj liab ntim, tau sau nyiaj | ||
| Sau npe | 4mil | |
| Tus Neeg Muag Khoom Daim npog qhov ncauj | Ntsuab, Liab, Daj, Xiav, Dawb, Dub, Ntshav, Matte Dub, Matte green.etc. | |
Koj tuaj yeem nyiam:
1, Summary of matters needing attention in circuit board welding
3, What is PCB
4、Dab tsi yog npliag board kuaj?
5. Dab tsi yog qhov tsim PCB siab
Kawm paub ntau ntxiv txog YMS cov khoom
