Sk Microworks Co., Ltd.

Sk Microworks Solutions Co., Ltd.

Magnachip Semiconductor, Inc.

Skc Co., Ltd.

Sun Hwan Kim

Jin Woo Lee

Dae Seong Oh

Han Jun Kim

Heung Sik Kim

Jung Hee Ki

Sang Hun Choi

Myung Ho Park

Yun Hee Seo

Beom Su Kim

Jong Ho Lee

Sang Il Kim

Dawoo Jeong

Dong Jin Lim

Jae In Ahn

Joo Young Jung

Dae Sung Oh

Yun-Hee Seo

The embodiments relate to a polyamide-based film that is excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-based film, which comprises a polyamide-based polymer and has a plasticity characteristic value represented by the following equation of 18.45 to 19.97%, a process for preparing the same, and a cover window and a display device comprising the same: Plasticity characteristic value (%)=(100−nIT)/(HIT/HM). In this equation, nIT, HIT, and HM are measured according to the ISO 14577 standard with a nanoindenter, nIT is the elasticity (%), HIT is the indentation hardness (N/mm), and HM is the composite hardness (N/mm).

Polyamide-based film, preparation method thereof, cover window and display device comprising the same

The embodiments provide a polyamide-based film, which comprises a polyamide-based polymer and has a light resistance index of 0.660 GPa-1 or less as represented by the following Equation 1, whereby it has excellent mechanical properties, optical properties, and light resistance. [Equation 1] Light resistance index=ΔYI/Y. In Equation 1, Y is the modulus of the film, and ΔYI is the rate of change in yellow index (YI) of the film before and after a light resistance test in which UV rays are irradiated to the film at 60° C., the UV irradiation is stopped, and water is sprayed at 50° C.

Polyamide-based film, method of preparing polyamide-based film, cover window and display device comprising the same

The embodiments relate to a polyamide-imide film excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-imide film, which comprises a polyamide-imide polymer and has a reduced modulus of a top surface measured by the nanoindentation method according to the ISO 14577-2 standard of 5.6 GPa or more and a haze of 1% or less, a process for preparing the same, and a cover window and a display device comprising the same.

Polyamide-imide film, preparation method thereof, cover window and display device comprising the same

The embodiments relate to a polyamide-based film excellent in optical properties such as transmittance, haze, and yellow index and mechanical properties such as modulus and thickness uniformity, to a process for preparing the same, and to a cover window and a display device comprising the same. The polyamide-based film comprises a polyamide-based polymer and has an XRD pattern comprising a first peak whose highest point is located in a section where 2θ is 14° to 16°.

Polyamide-based film, preparation method thereof, and cover window and display device comprising same

The embodiments relate to a polyamide-based composite film with excellent curl characteristics, mechanical characteristics, and optical characteristics. The polyamide-based composite film comprises a base film comprising a polyamide-based polymer and a functional layer disposed on the base film, wherein when the polyamide-based composite film is placed on a surface light source such that the base film is in contact with the surface light source, light is irradiated from the surface light source, and the luminance value measured in the normal direction of the surface light source is 100%, the luminance value measured in the direction of 50° from the normal direction of the surface light source is 25% or more.

Polyamide-based composite film and display device comprising same

The embodiments relate to a polyamide-based composite film that not only has excellent curl characteristics, mechanical properties, and optical properties, but also exhibits a privacy protection effect at a wide angle of view and glossiness characteristics similar to those glass at a main angle of view, and to a display device comprising the same. There are provided a polyamide-based composite film that comprises a base film comprising a polyamide-based polymer; and a functional layer disposed on the base film, wherein a glossiness control value according to Equation 1 is 0 or more, and a displace device comprising the same.

The embodiments relate to a polyamide-based film excellent in optical properties, mechanical properties, and processing suitability and to a cover window and a display device comprising the same. The polyamide-based film comprises a polyamide-base polymer, wherein a dipolar solvent compatibility represented by the following equation is 18.5 to 24: Dipolar solvent compatibility=&#x221a;{square root over ((&#x3c3;&#x2212;&#x3b4;1)+(&#x3c3;&#x2212;&#x3b4;1))}. In the equation, &#x3c3;is a value of a dispersible component in surface energy of the polyamide-based film, &#x3c3;is a value of a polar component in surface energy of the polyamide-based film, &#x3b4;1is a value of a dispersible component in Hansen solubility parameter of the dipolar solvent, and &#x3b4;1a value of a dipolar component in Hansen solubility parameter of the dipolar solvent.

Polyamide-based film, and cover window and display device comprising same

The embodiments relate to a polyamide-based composite film that has excellent curl characteristics, mechanical properties, and optical properties, as well as, in particular, is effective in preventing reflection in the visible light region, remarkably reduces the rainbow phenomenon, and achieves a texture similar to that of glass, and a display device comprising the same. There are provided a polyamide-based composite film, which comprises a base film comprising a polyamide-based polymer; and a functional layer disposed on the base film, wherein the in-plane retardation (Re) measured with light having a wavelength of 550 nm is 100 nm to 220 nm, and a display device comprising the same.

Polyamide-based composite film and display device comprising the same

Disclosed herein are a polyamide-imide film which is transparent and exhibits superior mechanical properties such as surface hardness, etc. and a method of preparing the same. The polyamide-imide film a copolymer of an aromatic diamine, an aromatic dianhydride, and an aromatic dicarbonyl compound, wherein the aromatic diamine and the aromatic dianhydride forms an imide unit; the aromatic diamine and the aromatic dicarbonyl compound forms an amide unit; and the amide unit accounts for 50-70 mol % of 100 mol % of the units of the copolymer, thereby exhibiting transparency and superior mechanical properties including surface hardness.

Colorless and transparent polyamide-imide film, and manufacturing method therefor

A wafer-level chip-scale package includes: a power semiconductor comprising a first semiconductor device formed on a semiconductor substrate, and a second semiconductor device formed on the semiconductor substrate; a common drain electrode connected to the first semiconductor device and the second semiconductor device; a first source metal bump formed on a surface of the first semiconductor device; and a second source metal bump formed on the surface of the second semiconductor device; wherein the first source metal bump, the common drain electrode, and the second source metal bump form a current path in an order of the first source metal bump, the common drain electrode, and the second source metal bump.

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Incheon, South Korea

Sun Hwan Kim