Lg Chem, Ltd

Lg Chemical Co., Ltd.

You-Jin Kyung

Heon-Sik Song

Byeong-In Ahn

Soon-Yong Park

Sang-Young Lee

Kwang-Joo Lee

Soon-Ho Ahn

Hee-Jung Kim

Hyung-Keun Lee

Hyang-Mok Lee

Seung-Jin Lee

Jin-Yeon Cho

Hyun-Hang Yong

Jung-Hak Kim

Joo-Eun Ko

Yong-Jun Park

Jung-Jin Shim

Byung-Nam Kim

Jung-Il Yoon

Sung-Gap Im

Se-myung Jang

Joo-eun Ko

Se-Myung Jang

Byeong-In; Ahn

Seung-Jin Lg Chemical Lee

Hyang-Mok Lg Chemical Lee

Soon-Yong Lg Chemical Park

Sang-Young Lg Chemical Lee

Heon-Sik Lg Chemical Song

Byeong-In Lg Chemical Ahn

The present invention relates to a novel polyamic acid introduced with an imidazolyl group in the polymer chain, a photosensitive resin composition including the polyamic acid and that is capable of providing a photosensitive material that satisfies the characteristics of an excellent bending property and low stiffness and also exhibits excellent heat resistance and coating resistance, a dry film obtained from the photosensitive resin composition, and a circuit board including the dry film.

Poly-amic acid, photo-sensitive resin composition, dry film, and circuit board

The present invention relates to novel polyamic acid; a photosensitive resin composition satisfying excellent flexibility and low stiffness and exhibiting excellent heat resistance and plating resistance; a dry film obtained from the photosensitive resin composition; and a circuit board including the dry film.

Polyamic acid, photosensitive resin composition, dry film and circuit board

The present invention provides a multi-component composite film comprising a) polymer support layer, and b) porous gellable polymer layer which is formed on one side or both sides of the support layer of a), wherein the support film of a) and the gellable polymer layer of b) are unified without the interface, a method for preparing the same, and a polymer electrolyte system applied the same.

Multi-component composite film method for preparing the same

The present invention relates to a polyimide photosensitive resin composition that is capable of being developed by an alkali aqueous solution, and a dry film that is produced by the same, and more particularly to a photosensitive resin composition which comprises a) a polyamic acid, b) two or more (meth)acrylate&#x2014;based compounds that include one or more double bonds between carbons, c) a photopolymerization initiator, d) a phosphorus&#x2014;based flame retardant, and e) an organic solvent, and a dry film that is produced by the same.

Alkali developable photosensitive resin composition and dry film manufactured by the same

The present invention relates to a photosensitive resin composition which is developable with an alkaline aqueous solution and does not need a high temperature for curing and the like, and has all the properties suitable for use in a cover film of a printed circuit board or a laminated body for a semiconductor, and a dry film comprising the same. The photosensitive resin composition comprises (A) a polyamic acid comprising a polymer of at least one diamine compound and at least one acid dianhydride; (B) a photopolymerizable compound having at least one polymerizable ethylenic unsaturated bond in its molecule; and (C) a photoinitiator.

Photosensitive resin composition and dry film comprising the same

The present invention provides a photosensitive resin composition comprising: a polyamic acid including a specific repeating unit; a heterocyclic amine compound; a (metha)acrylate-based compound including one or more double bonds between carbons; a photoinitiator; and an organic solvent, and a dry film prepared therefrom. The photosensitive resin composition can be cured at a low temperature to offer process safety and work convenience, and has excellent bending resistance, soldering heat resistance, and a property of filling the pattern, as well as excellent heat resistance and mechanical properties.

Low temperature curable photosensitive resin composition and dry film manufactured by using the same

The present invention provides a multi-component composite film comprising a) polymer support layer; and b) porous gellable polymer layer which is formed on one side or both sides of the support layer of a), wherein the support film of a) and the gellable polymer layer of b) are unified without the interface, a method for preparing the same, and a polymer electrolyte system applied the same.

The present invention relates to a double-sided metallic laminate for a printed circuit board and a method for manufacturing the same. The double-sided metallic laminate which comprises a metallic layer at one side, a resin layer of a polyimide for improving adhesion with a metal, a resin layer of a low expansion polyimide having a thermal expansion coefficient of 5&#xd7;10to 2.5&#xd7;10/&#xb0; C. and a metallic layer at the other side, has excellent flexibility and thermal resistance, can prevent curl and is securely laminated, particularly without the use of an adhesive. Therefore, it is suitable for a printed circuit board of a small size electric appliance.

Double-sided metallic laminate and method for manufacturing the same

The present invention relates to a multi-component composite separate membrane and a method for preparing the same, and to a multi-component composite membrane comprising a support layer and active layers, wherein the support layer is located between the active layers.

Multi-component composite membrane and method for preparing the same

The present invention provides a electrochemical element, wherein a multi-component composite film comprising a) polymer support layer film and b) a porous gellable polymer layer which is formed on either or both sides of the support layer film of a), wherein the support layer film of a) and the gellable polymer layer of b) are unified with each other without an interface between them.

Electrochemical device using multicomponent composite membrane film

The present invention relates to a high crystalline polypropylene microporous membrane and a preparation method of the same, and it provides a preparation method of a polypropylene microporous membrane comprising the steps of preparing a precursor film using high crystalline polypropylene having a crystallinity of 50% or more and a very high isotacticity, annealing, stretching at a low temperature, stretching at a high temperature, and heat setting, and a polypropylene microporous membrane having superior permeability and mechanical properties prepared by the preparation method.

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Seoul, South Korea

You-Jin Kyung