News

Screen printing on electric circuit

2017-03-14

Screen printing technology despite a relatively simple technology, but in the high-precision circuit board industry applications still poses a challenge to many practitioners.
Circuit board industry in the slurry screen size accuracy at least have outstanding performance can be regarded as precise, and this printing machine not every factory can manufacture:
1) superb processing technology;
2) Screen printing machine every detail of the precise measurement and regulation;
3) to ensure the stability of screen printing machine;
4) inks, screen, scraper elements, such as printing the height match.

Screen printers are widely used in the circuit board printing industry:
Printing content
• Solder mask printing: Print solder mask ink on the circuit board to form a solder mask to prevent short circuit and leakage of the circuit board, protect the circuit graphics, and improve the insulation performance and service life of the circuit board.
• Character printing: Print characters, logos and graphics on the circuit board, such as component numbers, circuit symbols, company trademarks, etc., to facilitate the installation, debugging, maintenance and identification of the circuit board.
• Conductive circuit printing: It can be used to print some simple conductive circuits, especially in flexible circuit boards or some circuit boards that do not require extremely high precision, and conductive circuits are formed by printing conductive ink.
Application of different types of circuit boards
• Single-sided board: Screen printing is performed on a single-sided board, mainly printing solder mask and characters, so that the welding side and non-welding side of the circuit board are clearly distinguished, which is convenient for plug-in and welding operations.
• Double-sided board: Screen printing is required on both sides, with solder mask and characters printed on one side and circuit graphics or other logos printed on the other side as needed to ensure the circuit functions and logos on both sides are complete.
• Multilayer boards: Silk screen printing is performed on the outer layer of the multilayer board, mainly printing the solder mask and characters, which protects and identifies the multilayer board, and also improves the appearance quality and recognizability of the multilayer board.