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!
在线联系供应商
Other supplier products
PCB Components Sourcing | GreensTone Electronics employs a dedicated, parts sourcing and procurement team to manage the logistics and procurement of PCB assemblycomponents u... | |
FR4 PCB | What is FR4? FR4is the name of a type of epoxy glazing material. fr stands for flame retardant. 4 refers to the factors that differentiate it fr... | |
DELIVER MOLDING MECHANICAL DESIGNS SYSTEMATICALLY | GreensTone mechanical design engineers will work with your team to design and test the best solutions for your products. Gain full access to our sp... | |
High-TG PCB | Glass Transition Temperature is referred to as Tg, and FR4 is a designation for a particular type of epoxy glass. Normal FR4 Tg ranges from 130 ... | |
Prototype PCB Assembly | The benefits of GreensTone's turn-key china pcb prototype servicecan be utilized for clients who require a convenient, quick turnaround for the pro... |
Same products
TSH-800 Crawler Mounted Water Well Drilling Rig | 卖方: Jinzhou City TongShun Drilling Machine Co.,Ltd | Versatile Drilling Capability: Drilling diameter range 140-400mm. Enhanced Efficiency: Drilling ... | |
多层PCB制造制造商组装工厂电路板SMT工厂制造 | 卖方: 840353 | Hello,很高兴在这里见到你。我是Topfast的伊森。我们是PCB PCBA一站式解决方案供应商超过20年。 您正在寻找一个伟大的PCB&PCBA供应商吗?PCB制造,Pcba P... | |
定制陶瓷PCB装配供应商工厂电路板PCB原型制造 | 卖方: 840353 | Hello,很高兴在这里见到你。我是Topfast的伊森。我们是PCB PCBA一站式解决方案供应商超过20年。 您正在寻找一个伟大的PCB&PCBA供应商吗?PCB制造,Pcba P... | |
控制器原型电路板PCBA定制服务开发PCB装配厂 | 卖方: 840353 | Hello,很高兴在这里见到你。我是Topfast的伊森。我们是PCB PCBA一站式解决方案供应商超过20年。 您正在寻找一个伟大的PCB&PCBA供应商吗?PCB制造,Pcba P... | |
定制原型金属PCB电路板电子PCB SMT制造商工厂供应商 | 卖方: 840353 | Hello,很高兴在这里见到你。我是Topfast的伊森。我们是PCB PCBA一站式解决方案供应商超过20年。 您正在寻找一个伟大的PCB&PCBA供应商吗?PCB制造,Pcba P... |