Abstract:
A method for forming salicides with lower sheet resistance and increased sheet resistance uniformity over a semiconductor process wafer including providing a semiconductor process wafer having exposed silicon containing areas at a process surface; depositing a metal layer including at least one of cobalt and titanium over the process surface; carrying out at least one thermal annealing process to react the metal layer and silicon to form a metal silicide over the silicon containing areas; and, wet etching unsilicided areas of the metal layer with a wet etching solution including phosphoric acid (H3PO4), nitric acid (HNO3), and a carboxylic acid to leave salicides covering silicon containing areas at the process surface.
Abstract translation:一种用于在半导体工艺晶片上形成具有较低的薄层电阻和增加的薄层电阻均匀性的硫化物的方法,包括提供在处理表面具有暴露的含硅区域的半导体工艺晶片; 在工艺表面上沉积包括钴和钛中的至少一种的金属层; 执行至少一个热退火工艺以使金属层和硅反应以在含硅区域上形成金属硅化物; 并用含有磷酸(H 3 PO 4),硝酸(HNO 3)和羧酸的湿蚀刻溶液湿法蚀刻金属层的无硅区域,以留下在工艺表面覆盖含硅区域的水杨酸盐。
Abstract:
A wafer chuck for use in a semiconductor process chamber capable of producing an inert gas blanket positioned on the chuck from residual chemical vapor in the chamber is disclosed. A plurality of mounting pins for supporting a wafer is further provided in the upper surface for forming an inert gas into a cavity formed between the wafer and the upper surface of the chuck. A plurality of apertures in a sidewall of the body portion for flowing an inert gas into the lower chamber forming an inert gas blanket blocking a passageway between the upper and lower chambers, thus preventing the wafer from damage by residual chemical vapor in the lower chamber.
Abstract:
A method for eliminating wafer breakage during a wafer transfer process in a grinding apparatus by a wafer transfer pad and an apparatus for conducting such method are disclosed. In the method, a surface of the vacuum pad, or the wafer transfer pad, that is formed of sintered ceramic is first cleaned by contacting a rotating brush and a spray of cleaning solvent. The invention further discloses an apparatus for eliminating wafer breakage during the wafer transfer process by a vacuum pad by incorporating a pressure regulating valve situated in the vacuum conduit such that a vacuum pressure applied can be regulated at a rate not higher than 30 psi/sec. to the surface of the wafer transfer pad.