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OSP Ceramic PCB Flexible Printed Circuit Immersion Tin LED Bulb PCB Board

USD+0.01-0.5+per pcs
OSP Ceramic PCB Flexible Printed Circuit  Immersion Tin LED Bulb PCB Board
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Type:: Consumer Electronics PCBA
Place Of Origin: Guangdong, China
Material:: Fiberglass Epoxy Resin + Polyimide Resin
Base Material: Aluminum
Insulation Materials: Metal Composite Materials
Surface Finishing: OSP, Immersion Gold, Immersion Tin, Immersion AG
Layer: 1-40 Layer
Surface Finished: HASL, Gold Finger, OSP, Enig, Peelable Mask
Trade Mark: OEM, ODM
Solder Resist Color: Green;Red;Yellow;Black;White
HS Code: 8534009000
High Light:

OSP Ceramic PCB


LED Bulb PCB Board OSP


LED Bulb PCB Board Immersion Tin

Basic Infomation
Place of Origin: Guangdong, China
Brand Name: GW-PCBA
Certification: ISO/TS16949/RoHS/TS16949
Model Number: PCBA-1103
Payment & Shipping Terms
Packaging Details: PCB: Vacuum Packing with Carton Box PCBA: ESD Packing with Carton Box
Delivery Time: PCB 3-7dyas, PCBA 1-3weeks/1 - 1000 -15days;1001 - 5000-20days;5001 - 20000-35days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 30000 Square Meter/Square Meters per Month module electronic board
Product Description

OSP Flexible Printed Circuit 13 Layers LED Bulb PCB Board Immersion Tin

        General Knowledge of PCB OSP Surface Finish

The electric connection on a PCB depends on the conductivity of copper. As an active chemical substance, however, copper tends to be oxidized when being exposed to atmospheric humidity, thereafter leading to issues that will possibly take place in high-temperature soldering, which badly threatens components' solid fixation on PCBs and reduces reliability of end products. Therefore, Surface finish carries two key responsibilities when it comes to the performance of PCBs: to protect copper from being oxidized and to provide a surface for high solderability when components are ready to be assembled on PCBs.


Board finishes can be classified into different classifications based on different technologies and involved chemical substances: HASL (hot air soldering leveling), Immersion Tin/Silver, OSP, ENIG and ENEPIG, etc. Among all the finishes, OSP is becoming increasingly prevalent owing to its low cost and environment-friendly attributes, which adds more necessity for us to better understand it. That's what this article aims to tell you.

Brief Introduction of OSP

OSP is short for "organic solderability preservatives", and it's also called anti-tarnish. It refers to a layer of organic finish generated on clean and bare copper by adsorption. On the one hand, this organic finish is capable of stopping copper from being oxide, thermal shock or moisture. On the other hand, it has to be easily eliminated by flux in the later process of soldering so that the exposed clean copper can be jointed with melting solder so that solder joints can be generated in extremely short time.


The applied water-based chemical compound belongs to azole family such as benzotriazoles, imidazoles, and benzimidazoles, all of which get adsorbed on the copper surface with coordination formed between them and copper atoms, leading to the production of film. In terms of film thickness, film made through benzotriazoles is thin while that through imidazoles is relatively thick. The differentiation on thickness will bring distinct impact to effect of board finish which will be discussed in the later part of this article.

Manufacturing Process of OSP

Actually, OSP has a decade's history which is longer than that of SMT (Surface Mount Technology). Here's OSP's manufacturing process.


Manufacturing Process of OSP (Organic Solderability Preservatives) | PCBCart


Note: DI refers to deionization.


The function of "Clean" is to clean off the organic contaminants such as oil, finger prints, oxidation film etc. so as to get copper foil surface stay clean and bright, which is the fundamental demand. This step plays quite a crucial role in preservatives build quality. Bad cleaning will tend to cause uneven thickness of preservatives build. In order to ensure the high quality of finished OSP film, on the one hand, concentration of cleaning solution should be controlled within a standard range through chemical laboratory analysis. On the other hand, cleaning effect is advised to be checked as often as possible and once the effect doesn't reach the standard, cleaning solution should be instantly replaced.


In the process of Topography enhancement, micro etching is usually applied to substantially eliminate the oxidation generated on copper foil so that the bonding forces can be improved between copper foil and OSP solution. The speed of micro etching directly influences the film build rate. Thus, in order to obtain smooth and even film thickness, it's critical to keep the stability of micro etching speed. Generally speaking, it's suitable to control the micro etching speed in the range from 1.0 to 1.5μm per minute.


It's best that DI rinse is utilized before preservatives build in case OSP solution will be polluted by other ions, which leads to tarnish after reflow solder. Similarly, it's best that DI rinse should be utilized after preservatives build with the PH value between 4.0 and 7.0 in case preservatives would be destroyed as a result of pollution.

Advantages of OSP

Nowadays, OSP has been usually applied due to its advantages that are discussed below:
• Simple manufacturing process and Reworkable: Circuit boards coated with OSP can be easily reworked by PCB fabricators so that PCB assemblers are allowed to have fresh coatings once its coating is found damaged.
• Good wettability: OSP-coated boards perform better in terms of solder wetting when flux meets vias and pads.
• Environment friendly: Since water-based compound is applied in the process of OSP generation, it does no harm to our environment, just falling into people's expectations for green world. As a result, OSP is an optimal selection for electronic products catering to green regulations such as RoHS.
• Low cost: Due to the simple chemical compounds applied in OSP creation and its easy manufacturing process, OSP stands out in terms of cost among all types of surface finishes. It costs less, leading to a lower cost of circuit boards in the end.
• Fit for reflow soldering in double-side SMT assembly: Along with the constant development and progress of OSP, it has been accepted from single-sided SMT assembly to double-sided SMT assembly, dramatically widening its application fields.
• Low requirement for solder mask ink
• Long storage time


OSP Ceramic PCB Flexible Printed Circuit  Immersion Tin LED Bulb PCB Board 1

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Storage Requirement of PCBs Coated with OSP

Since the preservative generated by OSP technology is so thin and easy to be cut, much care must be taken in the process of operation and transportation. PCBs with OSP as surface finish are exposed to high temperature and humidity for such a long time that oxidation will be possibly generated on the surface of PCBs, thereafter leading to low solderability. Therefore, storing methods must stick to these principles:
a. Vacuum package should be utilized with desiccant and humidity display card. Put release paper between PCBs to stop friction destroying PCB surface.
b. These PCBs can't be directly exposed to the sunlight. The requirements of optimal storage environment include: relative humidity (30-70%RH), temperature (15-30°C) and storage time (fewer than 12 months).


General Knowledge of PCB OSP Surface Finish | PCBCart

Possible Problem of OSP after Soldering

Sometimes, the color of OSP boards changes after soldering, which mainly has something to do with preservatives thickness, micro etching quantity, soldering times and even abnormal contaminants. Luckily, this probelem can be observed just from the appearance. Usually, there are two circumstances:


Possible Problems of OSP after Soldering and Solutions | PCBCart


For Circumstance#1, in the process of soldering, flux is capable of helping eliminating oxidations so that soldering performance won't be influenced. Accordingly, no more measurements have to be taken. On the contrary, Circumstance#2 occurs because OSP integrity has been destroyed so that flux isn’t capable of eliminating oxidations, which will greatly decrease the soldering performance.


Therefore, following improvements and measurements must be taken to ensure the appearance and performance of organic solderability preservatives surface finish:
a. The thickness of OSP must be controlled within a certain range;
b. The amount of micro-etching must be controlled within a certain range;
c. During PCB fabrication, contaminants (gel residue, ink etc.) must be 100% eliminated in case partial abnormity or badly-performed solderability occurs.

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Helpful Resources
Detailed Introduction on PCB Surface Finishes and Their Applications
The Most Comprehensive Guidelines for Surface Finish Selection
Full Feature Custom PCB Manufacturing Service from China's Most Experienced Fab House
Guide on Getting PCB Fabrication Price within Seconds
File Requirements for a Quick And Efficient PCB Fabrication



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Company Information

Global Well Electronic Inc. is a professional PCB solution supplier from Shenzhen, China, integrating PCB circuit board production and processing, STM processing and mounting, PCBA OEM, component purchasing, PCB/PCBA custom design-production- A comprehensive PCB circuit board company with one-stop turnkey service of processing-assembly-finished products. The company has a strong supply chain system, a professional and efficient collaborative team, a sound and complete quality control system, and the business philosophy of honesty and trustworthiness, customer first, and presents the products to everyone with low prices, reliable quality, high-quality service and after-sales service. client.

We provide total PCB solutions from PCB design to final mass production, including PCB fabrication and assembly, component sourcing, solder paste stencils, conformal coatings, and more. Serving the global electronics field, including industrial control, medical electronics, military equipment, power communication, automotive electronics, AI artificial intelligence, smart home and other industries.

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Our factory located in Shenzhen, and have almost 300 employees, more than 30 production lines include SMT, DIP, automatic welding, aging test and assembly. We have SMT machines from Japan and Korea, automatic solder paste printing machines, solder paste inspection machine(SPI)12 temperature zone reflow soldering machine, AOI detector, X-RAY detector, wave soldering machine, EM PCB ,dispenser,laser print machine etc., Different line configurations can meet requirements from small sample order to bulk shipment.

Our company has obtained ISO 9001 quality system certification and ISO 14001 system certification. With multi-testingprocedures, our products carry out the quality system standard strictly.


Our Services

1. PCB fabrication.

2. Turnkey PCBA: PCB+components sourcing+SMD and through-hole assembly

3. PCB clone, PCB reverse engineering.
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PCB or PCBA Files Requests:

1. Gerber files of the bare PCB board
2. BOM (Bill of material) for assembly (please kindly advise us if there is any acceptablecomponents substitution.)
3. Testing Guide & Test Fixtures if necessary
4. Programming files & Programming tool if necessary
5. Schematic if necessary

OSP Ceramic PCB Flexible Printed Circuit  Immersion Tin LED Bulb PCB Board 10

PCB Technical Specification

(1) PCB Technical Specification

Order Quantity 1-300,000,30000 Square Meter/Square Meters per Month module electronic board
Layer 1,2,4,6,upto 40 layer
Material FR-4,glass epoxy,FR4 High Tg,Rohs compliant,Aluminum,Rogers,etc
PCB type Rigid,flexible,rigid-flexible
Shape Any shape: Rectangular,round,slots,cutouts,complex,irregular
Max PCB dimensions 20inch*20inch or 500mm*500mm
Thickness 0.2~4.0mm, Flex 0.01~0.25''
Thickness tolerance ± 10%
Copper thickness 0.5-4 oz
Copper thickness tolerance ± 0.25oz
Surface finish HASL,Nickle,Imm Gold,Imm Tin,Imm Silver,OSP etc
Solder mask Green, red,white,yellow,blue,black, Double-sided
Silk screen White,yellow,black,or negative, Double-sided or single-sided
Silk screen min line width 0.006'' or 0.15mm
Min drill hole diameter 0.01'',0.25mm.or 10 mil
Min trace/gap 0.075mm or 3mil
PCB cutting Shear,V-score,tab-routed

(2) Turnkey PCBA Capabilities

Turnkey PCBA PCB+components sourcing+assembly+package
Assembly details SMT and Thru-hole, ISO lines
Lead Time Prototype: 15 work days. Mass order: 20~25 work days
Testing on products Flying Probe Test, X-ray Inspection, AOI Test, functional test
Quantity Min quantity: 1pcs. Prototype, small order, mass order, all OK
Files we need PCB: Gerber files(CAM, PCB, PCBDOC)
Components: Bill of Materials(BOM list)
Assembly: Pick-N-Place file
PCB panel Size Min size: 0.25*0.25 inches(6*6mm)
Max size: 20*20 inches(500*500mm)
PCB Solder Type Water Soluble Solder Paste, RoHS lead free
Components details Passive Down to 0201 size
Leadless Chip Carriers/CSP
Double-sided SMT Assembly
Fine Pitch to 0.8mils
BGA Repair and Reball
Part Removal and Replacement
Component package Cut Tape,Tube,Reels,Loose Parts
PCBA process


Stripping-----Punching-----Electrical Testing-----SMT-----Wave

Soldering-----Assembling-----ICT-----Function Testing-----Temperature - Humidity Testing


Main Equipment:

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Packaging & Shipping

Packing details:

PCBA are packed into plastic bags. Plastic bags are put into small carton. 4 small carton into a big carton.

A big carton: 35×32×40 cm size.

Shipping Express:

FedEx, DHL, UPS, TNT, EMS, private lines, etc.

Air freight, Sea shipping

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If you need help on PCB layout, you can contact us and send the board to us. We also provide Reverse Engineering Service.

We have been providing PCB Manufacture for many years in China,and we have rich experience in product production and product assembly.We believe our team will provide high quality and low cost service for you.

Thank you very much for all your support .

Best Regareds.


Q:Are you manufacturer?
A:Yes we are manufacturer

Q:Do you provide samples?
A:Yes we can provide free samples,price and shipping cost open for negotiation

Q:How do you ensure the quality of your products
A:We will burn into file and test the product and ship it after confirming that there is no problem

Q:What certificates does this product have
A:We have CE,FCC,ROHS certified

Q:What about OEM and ODM?
A:We accept OEM and ODM orders,MOQ is open for discussion

Q:What is delivery terms and time?
A:We use FOB terms and ship the goods in 7-30days depend on your order quanlity,customization
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Contact Person : Guo
Tel : +8613418764280
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