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Printed circuit boards (PCB) occupie the largest portion of the electronic components industry, and PCB photosensitive inks (or PCB photoresist) are important supporting materials for PCBs. PCB photosensitive inks mainly include dry film photoresist, photosensitive solder resist inks, and wet film photoresists. Whatever the type of PCB photosensitive ink, it must meet certain performance requirements during use to maximize its effectiveness.
As a photoresist supplier, Alfa Chemistry has been focusing on the application of photoresists in many fields. We not only provide a variety of photosensitive ink products for PCB manufacturing, but also provide corresponding testing services. With Alfa Chemistry's advanced testing instruments and various analytical methods, we can meet customers' needs for PCB photosensitive ink performance analysis and assist them in success.
The twelve key performance parameters of PCB photosensitive ink are listed below, and these parameters all affect the quality of the product. In order to better apply PCB ink, these parameters must meet specific requirements. In different technological processes, the requirements for technical parameters are different.
In order to ensure that your are using high quality PCB photosensitive inks, Alfa Chemistry offers testing services for the following items.
| Test Items | Description |
Solder Quality Test | Direct visual inspection followed by 1.5 to 10x magnification using a magnifier. |
Adhesion Test | This test method uses 3M tape to determine the adhesion quality of PCB photosensitive inks used in conjunction with printed boards according to the IPC-TM-650/TM2.4.28.1 Standard. |
Hardness Test | This test method uses a pencil with a specific hardness (JIS standard) to draw a line on the coating and remove the toner with an eraser and check for scratches to test the coating hardness, according to IPC-SM-840C 3.5.1/TM 2.4.27.2 Standard. |
Acid & Alkali Resistance Test | The test method is to place the ink samples in acid and alkali solutions with specific concentrations (solutions usually are 0.1 mol/L of hydrochloric acid, sulfuric acid, sodium hydroxide and other solutions), and then inspect whether the ink color, brightness, and other indicators of change. |
Solvent Resistance Test | The test method is to clean the coating surface, then inspect whether the surface blistering, peeling, discoloration and other situations occur. |
High Temperature Resistance Test | The test for high temperature resistance includes four aspects: welding, soldering resistance, solder heat resistance, and the tin drift test. |
Other Test Items | Soldermask ink thickness test, undercut test, thermal shock resistance test, and solder dam test. |
For many years, Alfa Chemistry has been providing customers with solutions for lithography-related processes. Alfa Chemistry has reliable pre-sales and after-sales services, and is responsible for customers to the end. You can trust Alfa Chemistry for:
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Alfa Chemistry is a leading supplier of photoresists. Offering high-quality photoresists and process materials to customers along with full-service support is our top priority.
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