Taiwan Semiconductor Manufacturing Comp. Ltd.

Jui-Ming Shih

Ping-Jung Huang

Wen-Yu Ku

Bi-Ming Yen

Manish Kumar Singh

Nai-Chia Chen

Bo-Wei Chou

Pi-Chun Yu

Chun-Han Chu

Tsung-Min Chuo

A method includes rotating a wafer, dispensing a liquid from a center of the wafer to a peripheral edge of the wafer to control a temperature of the wafer, and etching an etch layer of the wafer with an etchant during or after dispensing the liquid. The liquid is dispensed through a nozzle.

Method for etching etch layer

A method includes rotating a wafer, dispensing a liquid from a center of the wafer to an edge of the wafer to control a temperature of the wafer, and etching an etch layer of the wafer with an etchant during or after dispensing the liquid. The liquid is dispensed through a nozzle.

An embodiment method includes forming a patterned etch mask over a target layer and patterning the target layer using the patterned etch mask as a mask to form a patterned target layer. The method further includes performing a first cleaning process on the patterned etch mask and the patterned target layer, the first cleaning process including a first solution. The method additionally includes performing a second cleaning process to remove the patterned etch mask and form an exposed patterned target layer, the second cleaning process including a second solution. The method also includes performing a third cleaning process on the exposed patterned target layer, and performing a fourth cleaning process on the exposed patterned target layer, the fourth cleaning process comprising the first solution.

Method of removing an etch mask

A method for etching an etch layer formed on a front side of a wafer and a wafer etching apparatus are provided. The wafer etching apparatus includes a first flow channel, a temperature-regulating module, and a second flow channel. The first flow channel is configured to carry a preheated/precooled liquid for controlling a temperature of a wafer. The temperature-regulating module is coupled to the first flow channel. The temperature-regulating module is configured to control a temperature of the liquid in the first flow channel. The second flow channel is configured to carry an etchant for etching an etch layer formed on a front side of the wafer. The method includes: controlling the temperature of the wafer by using the preheated/precooled liquid; and etching the etch layer with the etchant.

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Hsinchu, Taiwan

Jui-Ming Shih