Nan Ya Plastics Corporation

Viewsonic International Corporation

Shih-Hung Hsu

Cheng-Chung Lee

Yeong-Tong Hwang

Shao-En Hwang

A low dielectric constant (Dk) and dissipation factor (Df) of solder resistant mask composition comprising (A) a photopolymerizable prepolymer of formula (1); (B) a photopolymerizable vinyl monomer; (C) an epoxy compound; (D) a photopolymerization initiator; (E) an inorganic filler; (F) a catalyst; and (G) an organic solvent. The low dielectric constant (Dk) and dissipation factor (Df) of solder resistant mask composition has excellent photo and thermocurability, and high developability resolution with an alkaline aqueous solution, wherein the dielectric constant is below 3.20 (1 GHz), and the dissipation factor is less than 0.015 (1 GHz); 

Low Dk/Df solder resistant composition use for printed circuit board

A projection system includes a display device, a wireless presentation gateway, a computer terminal, and a portable device. The display device is used for displaying an image. The wireless presentation gateway is linked to the display device for transmitting image data to the display device. The computer terminal is linked to the wireless presentation gateway for transmitting the image data to the wireless presentation gateway. The portable device is connected to the computer terminal through a communication port for driving the computer terminal, the wireless presentation gateway, and the display device for performing an image display process automatically.

Growing community of inventors

Taipei, Taiwan

Shih-Hung Hsu