Abstract: A low-dielectric constant thin film prepared from a silsesquioxane polymer matrix as a precursor and a method for preparing the same which comprises preparing silsesquioxane sol by adding a stereoisomer of a multi reactive cyclosiloxane to an alkoxysilane are provided. The low-dielectric-constant thin film retains a stable film state even at a curing temperature of ?500° C. without being decomposed, a very uniform surface property with a low surface modulus, and a superior coatability as to be coatable smoothly with no crack even with a thickness of 500 nm or larger.

Abstract: Disclosed is a light-emitting material including a polysilsesquioxane having a ladder structure with photoactive groups bonded to a siloxane backbone. In addition to superior heat resistance and mechanical property, the light-emitting material provides improved cotability and film property when prepared into a thin film. Further, it provides higher luminous efficiency than the existing organic-based light-emitting material.

Abstract: Disclosed are a low-dielectric-constant thin film prepared from a silsesquioxane polymer matrix as a precursor, the silsesquioxane polymer matrix being a silsesquioxane sol prepared by adding a stereoisomer of a multireactive cyclosiloxane to an alkoxysilane, and a method for preparing the same. The disclosed low-dielectric-constant thin film retains a stable film state even at a curing temperature of ˜500° C. without being decomposed. Also, it exhibits a very uniform surface property with a low surface modulus and has such a superior coatability as to be coatable smoothly with no crack even with a thickness of 500 nm or larger. In addition, the low-dielectric-constant thin film according to the present disclosure may exhibit low dielectric property while having superior surface modulus and hardness.

Abstract: Disclosed is a light-emitting material including a polysilsesquioxane having a ladder structure with photoactive groups bonded to a siloxane backbone. In addition to superior heat resistance and mechanical property, the light-emitting material provides improved cotability and film property when prepared into a thin film. Further, it provides higher luminous efficiency than the existing organic-based light-emitting material.

Abstract: Disclosed are a polysilsesquioxane having a ladder structure with photoactive groups bonded at the siloxane main chain, and a method for preparing the same. Polysilsesquioxanes exhibiting superior thermal and mechanical properties and having various functionalities and characteristics depending on the photoactive groups introduced thereto may be prepared via a relatively simple method. The polysilsesquioxanes may be useful as an industrial material for organic-inorganic hybrid materials.