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
 |
Through-hole PCB Assembly | GreensTone provides china through hole pcb assemblyservices to meet conventional lead assembly requirements of a variety of industries. We provide ... |
 |
PCB Components Sourcing | GreensTone Electronics employs a dedicated, parts sourcing and procurement team to manage the logistics and procurement of PCB assemblycomponents u... |
 |
PCB Components Sourcing | GreensTone Electronics employs a dedicated, parts sourcing and procurement team to manage the logistics and procurement of PCB sourcingassembly com... |
 |
Box Build Assembly | China box build assemblyservices, known as systems integration, can be anything from a simple printed circuit board assembly housed in a small encl... |
 |
Plastic Injection Molding | Which Mold do you want to do? Plastic Injection/die casting or punch mold, etc. Which Mould Material do you want choice? 45#, 50#, P20, H13, 718, 2... |
Same products
|
|
PCB Surface | Seller: GreensTone (Shenzhen) Electronics Co., Limited | PCB surfacefinish include: PCB plating finishesis a coating between a component and a bare board ... |
|
|
PCB Components Sourcing | Seller: GreensTone (Shenzhen) Electronics Co., Limited | GreensTone Electronics employs a dedicated, parts sourcing and procurement team to manage the log... |
 |
PCB Capability | Seller: GreensTone (Shenzhen) Electronics Co., Limited | GreensTone has successfully served customers with pcb manufacturing capabilitiesservice in commun... |
 |
PCB Assembly Service | Seller: GreensTone (Shenzhen) Electronics Co., Limited | GreensTone specializes in the pcba pcb assembly, including: Circuit board assembly Surface moun... |
 |
High-TG PCB | Seller: GreensTone (Shenzhen) Electronics Co., Limited | Glass Transition Temperature is referred to as Tg, and FR4 is a designation for a particular type... |
