METHOD FOR FORMING BUILT-IN RESISTOR BY USING PHOTO-SENSITIVITY PASTE WITH RESISTANCE

摘要

A method for forming a built-in resistor by using a photo-sensitive resistive paste is provided to reduce a variation of a resistance of the photo-sensitive resistive paste by using a PSR(Photo Solder Resist) and a conductive filler. A pair of conductive units(111,112) are arranged to be apart from each other on a support unit(100). A photo-sensitive resistive paste(121) is applied on the support unit to enclose the conductive units. A mask is positioned at a region apart from an upper portion of the photo-sensitive resistive paste, and the photo-sensitive resistive paste is exposed by using the mask. A non-exposed photo-sensitive resistive paste is removed by using a developing solution. A non-removed photo-sensitive resistive paste is cured to form a resistive material. A protective film is formed on the support unit to enclose the resistive material and the conductive units. The photo-sensitive resistive paste is made of a conductive filler, a photo solder resist, a dispersing agent, and a solvent. A concentration of the conductive filler is between 7 and 15 w%.