Laser processing of solder resist layers on laminated substrates

The microelectronics industry is moving toward smaller feature sizes. The main driving forces are to improve performance and to lower cost. From the point of view of performance, the small distances between chips together with the short interconnection routes have of great importance in order to achieve faster operation. The application of polymers for the insulating and protective layers of interconnect substrates is beneficial to the performance and to the cost of a circuit module as well. In the article, the application of advanced laser technology for pattern and via generation has become an efficient tool for the fabrication of very high density interconnects substrates.