Hyundai Motor Company

Kia Motors Corporation

Sk Innovation Co., Ltd.

Snu Rdb Foundation

Nexflex Co., Ltd.

Ho Sub Kim

Young Do Kim

Weon Jung Choi

Dae Nyoun Kim

Seung Woo Choi

Byoung Wook Jo

Cheol Ho Kim

Yoon Kyung Choi

Yong Seok Lee

Kook Heon Char

Heon Su Jeon

Sung Cheul Jeong

Seung Jeong Kook

Kyungtaek Min

Provided are a multi-layer flexible metal-clad laminate, and a manufacturing method thereof, and more particularly, a multi-layer flexible metal-clad laminate in which at the time of manufacturing a multi-layer polyimide film on a surface of a metal-clad having a predetermined surface roughness value (Rz, Ra) and having roughening particles having a predetermined size or less attached thereon, a multi-coating scheme is used to form each polyimide mixed layer, such that a light reflection on a surface of the polyimide film and a light reflection generated at an interlayer interface of the polyimide in the multi-layer polyimide film are decreased to have an improved light transmittance of a polyimide laminate film after the metal-clad is removed, and a manufacturing method thereof.

Multi-layer flexible metal-clad laminate and manufacturing method thereof

A flexible copper-clad laminate for a vehicle LED lamp is provided and includes a copper-clad layer and a composite layer that are laminated. The composite layer includes a polyimide layer and thermoplastic polyimide layers. An outermost layer of the composite layer is formed as a thermoplastic polyimide layer. A total thickness of the thermoplastic polyimide layers and an entire thickness of the polyimide layer with respect to a total thickness of the composite layer is about 10 to 50% and 50 to 90%, respectively. The total thickness of the thermoplastic polyimide layers and the entire thickness of the polyimide layer with respect to the thickness of the composite layer is about 20 to 40% and 60 to 80%, respectively. A thickness of the copper-clad layer is about 30 to 80 &#x3bc;m, and the total thickness of the composite layer is about 10 to 15 &#x3bc;m.

Copper clad laminate for vehicle LED lamp, printed circuit board including the same, and manufacturing method thereof

Disclosed is a flexible copper clad laminate including a first copper foil layer, a composite layer, and a second copper foil layer. Preferably, the composite layer includes a polyimide layer and a plurality of thermoplastic polyimide layers as an outermost layer thereof being the thermoplastic polyimide layers. In particular, with respect to a total thickness of the composite layer, a total thickness of the plurality of thermoplastic polyimide layers is in a range of from about 15 to about 50%, and a total thickness of the polyimide layer is in a range of from about 50 to about 85%. Each thickness of the first copper foil layer and the second copper foil layer is in a range of from about 30 to about 80 &#x3bc;m, and the total thickness of the composite layer is in a range of from about 40 to about 60 &#x3bc;m.

Copper clad laminate, printed circuit board including the same, and manufacturing method of the same

Provided is a method for manufacturing a flexible metal-clad laminate using a casting method, including: (a) forming a first polyimide layer having a coefficient of linear thermal expansion of 25 ppm/K or less above a metal layer; (b) plasma-treating a surface of the first polyimide layer; and (c) forming a second polyimide layer having a coefficient of linear thermal expansion of 25 ppm/K or lower above the first polyimide layer. The flexible metal-clad laminate according to the present invention can have excellent adhesion between the polymer film and the metal conductive layer, a low dimensional change, and a low production cost, because of superior casting workability, even though the thickness of polyimide becomes increased.

Method for manufacturing thick polyimide flexible metal-clad laminate

A flexible metal clad laminate includes a metal foil, and a multilayered polyimide film including a first polyimide layer having a glass transition temperature of 300&#xb0; C. or less and disposed on the metal foil, a second polyimide layer disposed on the first polyimide layer and a third polyimide layer disposed on the second polyimide layer. According to the flexible metal clad laminate of the present invention, appearance defects such as blistering generated during curing process in a continuous curing machine using an infrared heat source may be solved, interlayer delamination may be prevented due to a good adhesion strength with a metal layer, and an ACF bonding strength and a dimensional stability may be good. The flexible metal clad laminate may be useful for the manufacturing of a flexible printed circuit boards.

Flexible metal clad laminate and manufacturing method thereof

A light emitting device comprising a photonic crystal structure having a crystal structure in which nanospheres are densely arranged in a 3D manner, wherein the nanospheres have phosphors excited by an excitation source to emit light of a wavelength longer than a pump photon of the excitation source, wherein the photonic crystal structure has at least a photonic bandgap (PBG) along a specific crystal orientation, and wherein the wavelength of the pump photon overlaps a photonic bandedge region.

Light emitting device having photonic crystal structure

Growing community of inventors

Seoul, South Korea

Ho Sub Kim