Enf Technology Co., Ltd.

Other

Kyungdong Navien Co., Ltd.

Gi Young Kim

Myung Ho Lee

Myung Geun Song

Jeong Sik Oh

Tae Ho Kim

Hak Soo Kim

June Kyu Park

Provided is an etchant composition for a silicon layer including: a fluoride-based compound; a nitrate-based compound; an acid mixture including a phosphoric acid-based inorganic acid and an organic acid; and a nitrosyl compound and capable of selectively etching the silicon layer with respect to a silicon oxide layer.

Etchant composition for silicon layer and etching method using the same

Silicon etching compositions are described and may be used for selectively etching silicon with respect to a silicon insulating film. In particular, the silicon etching compositions can be used to improve the selective etching ratio of silicon from the surface of a semiconductor on which a silicone oxide film and silicon are exposed.

Etching composition

An object of the present disclosure is to provide a pre-mixed burner capable of preventing a backfire, improving flame stability, and responding to various combustion loads. To attain the object, the present disclosure is implemented by including a flame hole member made of a foam body which is made from a plurality of metal alloys through a sintering process and in which an air hole being a space between struts configuring a framework is formed, and configured to form a flame by allowing a mixed gas of gas and air to be sprayed through the air hole, a flame hole member fixing plate configured to fixedly couple the flame hole member to a burner main body, and a distributing plate provided in front of the flame hole member and at which a plurality of distributing holes are formed so as to uniformly supply the mixed gas to the flame hole member.

Burner provided with flame hole member having air holes

A smart mouse device having an optical sensor and a pressure sensor is provided. The smart mouse device includes the optical sensor for outputting position data by using light emitted from and reflected off a light-emitting element, and the pressure sensor for outputting a pressure signal according to a pressing of the sensor. The smart mouse device also includes a controller for transmitting the position data and the pressure signal to a user terminal, and a user terminal connection unit which connects to the user terminal, and which transmits and receives data.

Growing community of inventors

Gyeonggi-do, South Korea

Gi Young Kim