PCB Surface
PCB surfacefinish include: PCB plating finishesis a coating between a component and a bare board PCB. It is applied for two basic reasons: to ensure solderability, and to protect exposed copper circuitry. As there are many types of surface finishes, selecting the right one is no easy task, especially as surface mounts have become more complex and regulations such as RoHS and WEEE have changed industry standards.
Recently, the common surface PCBtreatment technologies which GreensTone may use when manufacturing PCBs are HASL(hot air solder leveling), organic coating (OSP), electroless nickel/gold, immersion silver, immersion gold, etc.
The solder mask is mainly Liquid UV Photo-imageable Ink with green, red, black, yellow, white, matt black/green, bule, gray, etc. green should be the most commonly used one. The suggested soldermask clearance in GERBER is 2-4 mils.
The silkscreen layer is the top layer of the PCB and serves as a reference indicator for placing components on the PCB. The graphics and text on PCB, a circuit board is usually printed with a permanent non-conductive epoxy ink. The color is typically white. Screen printing is used to specify useful information on the PCB board, which can help users during the assembly. It is used to mark component values, part numbers, test points, polarity, etc.
PCB Surface Features
PCB surface finishComparison of cost and solderability
Actual solderability: Electroplating nickel gold> HASL > OSP > ENIG >Immersion silver >Immersion tin
Cost: Electroplating nickel gold > ENIG > Immersion silver> Immersion tin > HASL > OSP.
The functions of the solder mask layer on the PCB board
Preventing short circuit from bridge connection in the soldering process
Preventing the physical breakage of a conductor circuit
Prevent short circuit between conductive lines and solder joints when proceeding reflow soldering, wave soldering, and manual welding
Preventing the copper layer from oxidation
Its high Insulating brings the possibility to the high density of PCB finish
Here are three main ways to add silkscreen coating on a PCB
Manual screen-printing: This is a process that can be used when line widths are greater than 7 mm and the registration tolerance is 5 mm.
Liquid Photo Imaging (LPI): This process provides more accuracy and legibility over manual screening and is used when line widths are greater than 4 mm
Direct Legend Printing (DLP): This is the most accurate way of adding a silkscreen, however, it is very expensive.
For more information about electronic manufacturing service chinaand turnkey pcb assembly, please feel free to contact us!
Send product request
Other supplier products
 |
DELIVER MOLDING MECHANICAL DESIGNS SYSTEMATICALLY | DELIVER MOLDING MECHANICAL DESIGNS SYSTEMATICALLY GreensTone mechanical design engineers will work with your team to design and test the best solu... |
 |
CNC Machining | Custom machining cncis the abbreviation of "computer numerical control", custom cnc serviceis a kind of manufacturing process that instructs the op... |
 |
PCB Assembly Service | GreensTone specializes in the PCB assemblies, including: Circuit board pcbaassembly Surface mount technologies (SMT) Pin Through Hole Com... |
 |
SMT PCB Assembly | SMT PCB Assembly As SMT assembly supplier, GreensTone SMT production runs with automated SMT production processes, including single or double-si... |
 |
Turn-key PCB Assembly | As GreensTone CEO said, GreensTone has over 10 years of experience in the China turn key pcb assemblyindustry. Our core values are centered around ... |
Same products
 |
TSH-800 Crawler Mounted Water Well Drilling Rig | Seller: Jinzhou City TongShun Drilling Machine Co.,Ltd | Versatile Drilling Capability: Drilling diameter range 140-400mm. Enhanced Efficiency: Drilling ... |
 |
Multilayer PCB Manufacturing Manufacturer Assembly Plant Circuit Board SMT Factory Manufacture | Seller: 840353 | Hello， Nice to meet you here. I'm Eason from Topfast. We are PCB PCBA one stop solution supplier ... |
 |
Customized Ceramic PCB Assembly Supplier Factory Circuit Board PCB Prototype manufacture | Seller: 840353 | Hello， Nice to meet you here. I'm Eason from Topfast. We are PCB PCBA one stop solution supplier ... |
 |
Controller Prototype Circuit Board PCBA Custom Service Development PCB Assembly Factory | Seller: 840353 | Hello， Nice to meet you here. I'm Eason from Topfast. We are PCB PCBA one stop solution supplier ... |
 |
Customized Prototype Metal PCB Circuits Board Electronic PCB SMT Manufacturer Factory supplier | Seller: 840353 | Hello， Nice to meet you here. I'm Eason from Topfast. We are PCB PCBA one stop solution supplier ... |
