SEMI Font, also known as SEMI OCR font, is a font used for marking silicon wafers in the semiconductor device industry.
The SEMI font character set includes 26 uppercase letters, 10 numbers, dash and period.
Their shapes and dimensions are specified by SEMI M12/M13 standard, which was approved by Global Traceability Committee and North American Traceability Committee.
When used in “single-density” mode, laser scribers use a dot matrix of 5 dots horizontal and 9 dots vertical, in “double-density” mode, the matrix is 10 dots horizontal and 18 dots vertical.