Temperature control device and etching equipment

Abstract

The invention discloses a temperature control device and etching equipment. The device comprises a shell and a heating element arranged in the shell, wherein the shell is of an open structure, the shell is arranged on a top plate of the etching chamber, an opening of the shell faces the top plate, a temperature control cavity is formed between the top plate and the shell, and the heating element is used for heating gas in the temperature control cavity, so the temperature of the top plate of the etching chamber is close to the temperature of etching liquid in the etching chamber. According tothe embodiment of the invention, the gas in the cavity on the top plate of the etching chamber is heated through the heating element, so the top plate is heated, the temperature of the top plate is kept close to the temperature of the etching liquid in the etching chamber, and the volatile gas of the etching liquid is prevented from being condensed into liquid drops when meeting cold on the top plate of the etching chamber, thereby avoiding the etching process defect caused by falling of the liquid drops, guaranteeing the uniformity of an etching substrate, and increasing the yield of products.

Description

technical field [0001] The present application generally relates to the technical field of etching, and in particular relates to a temperature control device and etching equipment. Background technique [0002] In the etching process, in order to increase the etching rate, it is sometimes necessary to heat the chemical solution. During the etching process, the chemical solution in the etching chamber will volatilize. After the volatilized gas moves to the top of the etching chamber, it will be liquefied and condensed in the top of the etching chamber to form liquid droplets. [0003] As the amount of condensed liquid medicine increases, the droplet will gradually increase, and will eventually drop onto the etched substrate, causing the concentration of the liquid medicine at the drop position to change, and the uneven concentration of the etching solution will lead to Over-etching or under-etching of the etched substrate can lead to excessive deviation of CD Bias from the ...

AI Technical Summary

Problems solved by technology

[0003] With the increase of the amount of condensed liquid medicine, the droplet will gradually increase, and finally will drop onto the etched substrate, so that the medicine at the position where the liquid medicine drops The concentration of the etching solution changes, and the uneven concentration of the etching solution will lead to over-etching or under-etching of the etched substrate, which can lead to excessive deviation between CD Bias and the standard value, resulting in etching process defects and reducing product yield

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