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 manufacturing.
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.
Printed Circuit Board Introduction
Normal Printed 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 Normal PCB manufacturing capabilities:
|YMS Normal PCB manufacturing capabilities overview|
|Available Normal PCB Technology||Through hole with Aspect Ratio 16:1|
|buried and blind via|
|Hybrid||High Frequency Material such as RO4350B and FR4 Mix etc.|
|High Speed Material such as M7NE and FR4 Mix etc.|
|FR4||EM827, 370HR, S1000-2, IT180A, IT158, S1000 / S1155, R1566W, EM285, TU862HF,NP170G etc.|
|High Speed||Megtron6, Megtron4, Megtron7,TU872SLK, FR408HR,N4000-13 Series,MW4000,MW2000,TU933 etc.|
|High Frequency||Ro3003, Ro3006, Ro4350B, Ro4360G2, Ro4835, CLTE, Genclad, RF35, FastRise27 etc.|
|Others||Polyimide, Tk, LCP, BT, C-ply, Fradflex, Omega , ZBC2000,PEEK,PTFE,ceramic-based etc.|
|Minimum line Width and Space||0.05mm/0.05mm(2mil/2mil)|
|Min mechanical Drilled Size||0.15mm(6mil)|
|Aspect Ratio for through hole||16：1|
|Surface Finish||HASL, Lead free HASL,ENIG,Immersion Tin, OSP, Immersion Silver, Gold Finger, Electroplating Hard Gold, Selective OSP，ENEPIG.etc.|
|Via Fill Option||The via is plated and filled with either conductive or non-conductive epoxy then capped and plated over(VIPPO)|
|Copper filled, silver filled|
|Solder Mask||Green, Red, Yellow, Blue, White, Black, Purple, Matte Black, Matte green.etc.|