The present invention relates to a novel class of polymers which can be used as dielectric material for the preparation of passivation layers in electronic devices. The polymers are prepared from polymerizable compounds having mesogenic groups and they provide excellent film forming capability and excellent mechanical properties and have a low dielectric constant and a low coefficient of thermal expansion (CTE). There is further provided a method for forming said polymers and an electronic device containing said polymers as dielectric material. Beyond that, the present invention relates to a manufacturing method for preparing a packaged microelectronic structure and to a microelectronic device comprising said packaged microelectronic structure formed by said manufacturing method.

The present invention provides a method for preparing a coated article which includes: (a) providing a substrate; (b) applying a photo-polymerizable coating composition to at least a portion of the substrate, where the photo-polymerizable coating composition includes a photo-polymerizable anisotropic material, and a photoinitiator; (c) ordering the anisotropic material present in the photo-polymerizable coating composition; and (d) exposing the ordered photo-polymerizable coating composition of (c) to a light emitting diode light source having a peak emission wavelength ranging from 385 to 460 nanometers to cure the photo-polymerizable coating composition. The photoinitiator is capable of activation at the emission wavelength of the light emitting diode light source.

An object of the present invention is to provide a polymer compound in which, by blending with a liquid crystal composition containing a liquid crystalline compound, alignment of the liquid crystalline compound in a phase difference layer to be obtained increases; and a liquid crystal composition, a phase difference layer, an optical film, a polarizing plate, and an image display device using the same. The polymer compound of the present invention is a polymer compound including a repeating unit represented by Formula (I), a repeating unit represented by Formula (II), a repeating unit represented by Formula (III), and a repeating unit represented by Formula (IV).

##STR00001##

The present invention relates to a photo-responsive shape-changing structure and a driving method thereof. The photo-responsive shape-changing structure (100) is characterized in that it includes a first body portion (200) including at least one polymer film that undergoes a bending deformation in response to light irradiation, a second body portion (300) including at least one polymer film that undergoes a bending deformation in response to light irradiation, and a connection portion (400) configured to allow the first body portion (200) and the second body portion (300) to be connected to each other, wherein adhesive support portions (500, 600) are formed at one ends of the first body portion (200) and the second body portion (300), which are in contact with the ground (20).

Provided is a liquid crystal aligning agent composition including a liquid crystal polymer together with a polyimide-based (co)polymer, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.

Liquid-crystal polymer is composed of the following repeating units: 10 mol % to 35 mol % of

##STR00001##

10 mol % to 35 mol % of

##STR00002##

10 mol % to 50 mol % of

##STR00003##

and 10 mol % to 40 mol % of

##STR00004##

10 mol % to 40 mol % of

##STR00005##

or a combination thereof. Each of AR.sup.1, AR.sup.2, AR.sup.3, and AR.sup.4 is independently AR.sup.5 or AR.sup.5-Z-AR.sup.6, in which each of AR.sup.5 and AR.sup.6 is independently

##STR00006##

or a combination thereof, and Z is O,

##STR00007##

or C.sub.1-5 alkylene group. Each of X and Y is independently H, C.sub.1-5 alkyl group, CF.sub.3, or

##STR00008##

wherein R.sup.2 is H, CH.sub.3, CH(CH.sub.3).sub.2, C(CH.sub.3).sub.3, CF.sub.3, or

##STR00009##

n=1 to 4 ; and wherein R.sup.1 is C.sub.1-5 alkylene group.

A liquid-crystal polymer includes at least one repeating unit having a spiro structure, and the repeating unit occupies 1 mol % to 20 mol % of the liquid-crystal polymer. The liquid-crystal polymer is composed of the following repeating units: 1 mol % to 20 mol % of

##STR00001##

10 mol % to 35 mol % of

##STR00002##

10 mol % to 35 mol % of

##STR00003##

10 mol % to
50 mol % of

##STR00004##

and 10 mol % to 40 mol % of

##STR00005##

AR.sup.1 is

##STR00006##

wherein each of ring R and ring S is independently a C.sub.3-20 ring, ring R and ring S share a carbon atom, and each of K.sup.1 and K.sup.2 is independently a C.sub.5-20 conjugated system. Each of AR.sup.2, AR.sup.3, AR.sup.4, and AR.sup.5 is independently AR.sup.6 or AR.sup.6ZAR.sup.7.

A polymerizable composition includes a polymerizable liquid crystal compound of Formula (I) and a urethane (meth)acrylate monomer including a urethane bond and three or more (meth)acryloyl groups:
Q.sup.1-Sp.sup.1A-L.sub.m-1A-Sp.sup.2-Q.sup.2(I)
In Formula (I), A represents a cyclic divalent group (at least one is a divalent saturated hydrocarbon ring group), L preferably represents C(O)O or OC(O), m represents 3 to 12, Sp.sup.1 and Sp.sup.2 preferably are alkylene, and any one of Q.sup.1 and Q.sup.2 represents a polymerizable group. A film including a layer obtained by curing the polymerizable composition; and a film adjacently including a layer obtained by curing the polymerizable composition including a polymerizable liquid crystal compound represented by Formula (I) and a layer obtained by curing a composition including a urethane (meth)acrylate monomer and a manufacturing method thereof, are also disclosed. The polymerizable composition includes a polymerizable liquid crystal compound having low birefringence and provides a highly durable optical film.

A liquid crystal polymer film, and a composite film of liquid crystal polymer and polyimide and a manufacturing method thereof are provided. The liquid crystal polymer film includes 63 wt % to 74 wt % of p-hydroxybenzoic acid, 21 wt % to 26 wt % of 6-hydroxy-2-naphthoic acid, and 5 wt % to 11 wt % of p-hydroxycinnamic acid. The composite film is manufactured by thermocompressing a single layer or multi layers of liquid crystal polymer film and polyimide film so that the composite film can have high flatness and the surface roughness Sa of the composite film is ranging from 0.1 m to 10 m. In the production process of the composite film, the composite film is rolled up and attached to a copper foil to form a high frequency substrate with good processability. After peeling the polyimide film, the liquid crystal polymer film can be thermocompressed to form a four-layered, six-layered, eight-layered or eight-layered high frequency substrate.

The present invention provides a method for producing a cholesteric liquid crystal film capable of producing a cholesteric liquid crystal film which is formed into a predetermined shape without cracks and exhibits a high modulus of elasticity. The method for producing a cholesteric liquid crystal film according to the present invention includes step 1 of forming a coating film which includes a liquid crystal compound A having a first reactive group and a second reactive group that is different from the first reactive group or which includes a liquid crystal compound B having the first reactive group and a liquid crystal compound C having the second reactive group, step 2 of forming a cholesteric liquid crystalline phase in the coating film, step 3 of allowing the first reactive group to react to cure the coating film, step 4 of forming the coating film obtained in the step 3, and step 5 of allowing the second reactive group to react to produce a cholesteric liquid crystal film.