Patent ID: 8962419
Filing Date: 2015-02-24
Classification: H01L

Abstract:
1. A process of forming a complementary metal oxide semiconductor (CMOS) integrated circuit, comprising steps: providing a semiconductor substrate; providing a PMOS transistor formed in and on said substrate, including: providing a NMOS transistor formed in and on said substrate in an area separate from said PMOS transistor, including: forming a first stressor layer of silicon nitride over said PMOS transistor and said NMOS transistor, said first stressor layer having a compressive stress level between 1×1010 dynes/sq.cm and 3×1010 dynes/sq.cm, a ratio of Si—H bonds to N—H bonds greater than 7, and having a thickness between 55 and 65 nanometers; removing a portion of said first stressor layer from over said NMOS transistor using an aqueous phosphoric acid solution so that between one fourth and one half of said first stressor layer remains over said NMOS transistor; forming a second stressor layer over said PMOS transistor and said NMOS transistor, said second stressor layer having a tensile stress level between 1×1010 dynes/sq.cm and 3×1010 dynes/sq.cm, a ratio of Si—H bonds to N—H bonds less than 5, and a thickness between 15 and 25 nanometers; with said first stressor layer over the PMOS gate and said second stressor layer over both the PMOS gate and the NMOS gate, performing an anneal operation on said CMOS integrated circuit using a scanning laser anneal tool, such that: said CMOS integrated circuit is heated to a temperature between 1250° C. and 1350° C. for a time between 10 microseconds and 1 millisecond so that: lattice damage in said first source/drain implanted regions is repaired; lattice damage in said second source/drain implanted regions is repaired; said top portion of said PMOS gate is crystallized; and said top portion of said NMOS gate is crystallized; removing said first stressor layer and said second stressor layer from over said PMOS transistor and said NMOS transistor using an aqueous phosphoric acid solution.