Patent ID: 8673780
Filing Date: 2014-03-18
Classification: G03F,H01L

Abstract:
1. A method of processing a semiconductor substrate in forming scribe line alignment marks, comprising: forming non-circuitry first features within scribe line area of a semiconductor substrate, the first features comprising rings of first photoresist, the first features comprising inner and outer spacer rings formed about the first photoresist rings; removing the first photoresist rings from between the inner and outer spacer rings; after removing the first photoresist rings, depositing a second photoresist over the inner and outer spacer rings; and patterning the second photoresist to form non-circuitry second features within the scribe line area of the semiconductor substrate, the second features in cross-section comprising photoresist blocks having laterally outermost opposing sidewalls that are respectively received against a sidewall of one of the inner and outer spacer rings.