BTI GBBTI503643375-A
Description of goods
A HIGH PRECISION PLATE CONTAINING MICROSCOPIC IMAGES OF ELECTRONIC CIRCUITS. THE PHOTOMASK IS MADE FROM A VERY FLAT PIECE OF QUARTZ OR GLASS WITH A LAYER OF CHROME ON ONE SIDE. ETCHED IN THE CHROME IS A PORTION OF AN ELECTRONIC CIRCUIT. THE PHOTOMASK IS USED IN WAFER FABRICATION, MOSTLY TO MAKE IC'S (INTEGRATEDCIRCUITS). IC'S ARE USED IN MANY PRODUCTS LIKE COMPUTERS, CALCULATORS, CARS, CAMERAS, AND STEREOS. PHOTOMASKS ARE ALSO USED TO MAKE FLAT PANEL DISPLAYS, THIN FILM HEADS, PC BOARDS, ETC. THE DESIGN ON THE PHOTOMASK IS CREATED FROM DATA PROVIDED BY THE CUSTOMER.