JP2002210755A - Manufacturing method of optical element, optical element by its manufacturing method, display element and display means each having this optical element and camera element and camera means each having the optical element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of an optical element capable of controlling a height of a molded item or both of a height of a molded item and a height of a laminate of the molded item and a substrate, an optical ele ment by the manufacturing method, a display element and a display means each having the optical element and a camera element and a camera means each having the optical element. SOLUTION: In a manufacturing method of an optical element to manufacture an optical element by transferring a reversed shape of a mold to a resin using the mold, a bank is formed at an edge portion of the mold to control a height of an optical element molded item or not only the bank but also a groove is formed to control a height of a laminate of the optical element molded item and a substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an optical element, an optical element according to the method, a display element and a display device having the optical element, and an image sensor and an image pickup apparatus having the optical element. .

[0002]

2. Description of the Related Art Conventionally, in a method of manufacturing a liquid crystal panel or the like, there is a method of forming a bank using a resin in order to obtain a predetermined liquid crystal film thickness. For example, JP-A-5-88151 discloses a method of forming a diffraction grating and a bank using a resin material of a polymer-dispersed liquid crystal. According to this, the diffraction grating and the bank are manufactured by applying a resin on the counter electrode substrate and bringing the template into close contact.

[0003]

However, in the above-mentioned conventional example, a groove is formed in the template to obtain a liquid crystal film thickness, and a resin is poured into the mold to form a bank, and the height when the resin is bonded to the substrate is formed. (Cell gap) is maintained, but in order to manufacture an optical element such as a microlens, there is a problem that the height (film thickness) of the molded product must be further controlled.

Therefore, the present invention solves the above-mentioned problems of the prior art, and can control the height of a molded product, or can control both the height of a molded product and the height when a molded product is bonded to a substrate. Optical element manufacturing method, optical element by the manufacturing method,
It is an object of the present invention to provide a display element and a display device having the optical element, and an imaging element and an imaging device having the optical element.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for manufacturing an optical element constructed as described in the following (1) to (8), an optical element by the manufacturing method, and an optical element. It is an object to provide a display element and a display device having an element, and an imaging element and an imaging device having the optical element. (1) In a method for manufacturing an optical element, in which an inverted shape of the mold is transferred to a resin by using a molding die to produce an optical element, a bank is formed at an end of the molding die, and the optical element is formed by the bank. A method for manufacturing an optical element, comprising manufacturing an optical element by controlling the height of a molded product. (2) In a method for manufacturing an optical element, wherein an inverted shape of the mold is transferred and formed on a resin by using a molding die, a bank is formed at an end of the molding die, and the optical element is formed by the bank. Manufacturing the optical element by controlling the height of the molded product while forming a groove shape in the mold, and controlling the height when the optical element molded product and the substrate are bonded by the groove shape. The manufacturing method of the optical element characterized by the above-mentioned. (3) The method according to claim 2, wherein the groove shape is formed near the bank. (4) An optical element manufactured by the method for manufacturing an optical element according to any one of (1) to (3). (5) A display element comprising the optical element according to (4). (6) A display device comprising the display element according to (5). (7) An imaging element comprising the optical element according to (4). (8) An imaging device comprising the imaging device according to (7).

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In an embodiment of the present invention,
Applying the above configuration, for example, by using a mold having a bank, or a bank / groove shape, flowing and curing the resin in the mold, and transferring and molding the inverted shape to the resin, While the height (film thickness) of the molded product is controlled by the bank, the height at the time of bonding the molded product and the substrate can be controlled by the groove shape of the mold, and both heights can be controlled to an accuracy of 0.5 μm or less. It can be suppressed to.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to these embodiments. FIG. 1 is a diagram showing an example in which a method of manufacturing an optical element according to the present embodiment is applied to a method of manufacturing a microlens. In FIG. 1, (a) is a cross-sectional view when a molding resin 102 is put into a mold 101 and formed, and (b) is a cross-sectional view when a bonding resin 104 is put and bonded into the molding resin 102. is there.

The manufacturing method will be described first.
The molding resin 102 is applied so that bubbles do not form on the mold 101, and the molding glass substrate 103 is placed on the mold 101 so as to slowly contact the liquid, and the outer periphery of the molding glass substrate 103 is uniformly loaded with a load cell, Hold that weight for a certain period of time. At this time, the film thickness of the molding resin 102 follows the height H of the bank of the mold 101. Next, the weight is released, the load is released, and the resin is cured by irradiating ultraviolet rays with no load, and the molding resin 102 is separated from the mold 101.

Next, the formed substrate is turned over, a bonding resin 104 is applied, and the bonding side glass substrate 105 is placed on the forming resin 102 so as to come into contact with the liquid slowly, and a load cell is placed around the bonding side glass substrate 105. Is applied uniformly, and the weight is maintained for a certain period of time. At this time, the film thickness of the bonding resin 104 follows the height h of the bank of the molding resin 102. Next, the load by the load cell is released, the load is released, and the resin is cured by irradiating ultraviolet rays to produce a microlens.

[0010]

As described above, according to the present invention, the height of the molded product is adjusted by the bank of the mold by transferring and molding the resin to the bank using a bank or a mold having a bank / groove shape. It is possible to control the film thickness), and it is possible to control the height at which the molded article and the substrate are bonded by the groove of the mold.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a method for manufacturing a microlens according to an embodiment of the present invention.

[Explanation of symbols]

 101: Mold 102: Molding resin 103: Molding glass substrate 104: Laminating resin 105: Laminating glass substrate H: Film thickness of molding h: Film thickness of lamination

Claims (8)

[Claims] 1. An optical element manufacturing method for manufacturing an optical element by using a mold and transferring and forming an inverted shape of the mold to a resin, wherein a bank is formed at an end of the mold, and the bank is formed by the bank. A method of manufacturing an optical element, comprising manufacturing an optical element by controlling the height of an optical element molded product. 2. An optical element manufacturing method for manufacturing an optical element by using a mold and transferring and forming an inverted shape of the mold to a resin, wherein a bank is formed at an end of the mold, and the bank is formed by the bank. While controlling the height of the optical element molded product, an optical element is manufactured by forming a groove shape in the mold and controlling the height when the optical element molded product and the substrate are bonded by the groove shape. A method for manufacturing an optical element. 3. The method according to claim 2, wherein the groove shape is formed near the bank. 4. An optical element manufactured by the method for manufacturing an optical element according to claim 1. 5. A display element comprising the optical element according to claim 4. 6. A display device comprising the display element according to claim 5. 7. An imaging device comprising the optical element according to claim 4. 8. An image pickup apparatus comprising the image pickup device according to claim 7.