TW200946327A - Method of manufacturing light guide plate with micro-concave lens and micro-convex lens - Google Patents

Abstract

A method of manufacturing light guide plate with micro-concave lens and micro-convex lens comprises the steps of providing a first substrate. Forming a first photoresist layer on a first upper surface of the first substrate. Patterning the first photoresist layer to become a plurality of first pillar photoresist. Forming a plurality of first cambered surface on the first pillar photoresist in a first reflowing process. Electroforming a first metal having a first surface and a second surface on the first upper surface of the first substrate, and the second surface is faced the first cambered surface of the first pillar photoresist to form a plurality of cambered concave portion on the second surface of the first metal. Removing the first substrate and the first photoresist layer to become a first mold. Providing a second substrate. Forming a second photoresist layer on a second upper surface of the second substrate. Patterning the second photoresist layer to become a plurality of second pillar photoresist. Forming a plurality of second cambered surface on the second pillar photoresist in a second reflowing process. Electroforming a second metal on the second upper surface of the second substrate, and the second cambered surface of the second pillar photoresist is covered with the second metal to become a second mold and the second mold have a plurality of cambered convex portion. Providing a transparent substrate having a first exposing surface and a second exposing surface. Pressing the first and the second mold to the first exposing surface and the second exposing surface of the transparent substrate respectively to form a plurality of micro-concave lens and micro-convex lens on the first exposing surface and the second exposing surface of the transparent substrate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a light guide plate, and more particularly to a method of manufacturing a light guide plate having a micro concave-convex lens. [Prior Art] The lens microstructure of the conventional light guide plate is formed on the surface of the light guide plate by v_Cq type. For example, the Republic of China patent purchases the turn number, which is constructed on the lower surface of the light guide plate. The groove-like microstructure (V-ciit), and the micro-structure (v_cut) process is complicated, the production time is long and the tolerance of the angle is easy, which makes the manufacturing cost increase and the difficulty increases. Furthermore, the light guide plate of the V_eut form is prone to light interference (Moire) phenomenon, and the light guide plate has a poor degree of sentence, and an additional diffusion film must be provided to relatively increase the production cost. SUMMARY OF THE INVENTION The main object of the present invention is to provide a method for manufacturing a light guide plate having a micro concave-convex lens, comprising the steps of: providing a first substrate having a first upper surface and a first lower surface; a first photoresist layer on the first upper surface of the first substrate; patterning the first photoresist layer to form a plurality of first columnar photoresists; performing a first reflow step to make the The first columnar photoresist is formed with a plurality of first arcuate surfaces; a first metal material is electroformed on the first upper surface of the first substrate, and the first metal material has a first surface and a first surface The surface of the second surface is oriented toward the first arcuate surfaces of the first 枉-shaped photoresist such that the second surface of the first metal material is formed with a plurality of arcuate recesses; a first substrate and the first light F and 8 200946327 layers 'to form a first mold; a second substrate having a second upper surface and a first lower surface; forming a second photoresist layer The second upper surface of the second substrate; patterning the second photoresist layer to form a plurality a second columnar photoresist; performing a second reflow step such that the second columnar photoresists are formed with a plurality of second arcuate surfaces; and electroforming a second metal material to the second substrate The second upper surface covers the second arcuate surfaces of the second columnar photoresists to form a second mold having a plurality of arcuate protrusions; providing a transparent substrate And pressing the first mold to the first exposed surface of the transparent substrate and the second mold to the second exposed surface of the transparent substrate to enable the first exposure of the transparent substrate A plurality of micro convex lenses are formed on the surface, and a plurality of micro concave lenses are formed on the second exposed surface. The first and second reflow steps are used to make the first and second molds respectively have the arcuate concave portions and the arcuate convex portions to make the transparent substrate

[Embodiment]

The first substrate 110 is a method for manufacturing a light guide plate having a first lens, which is provided in steps 11 and 2A, and provides a first substrate having a first upper surface 111 and a first lower 200946327 surface 112' In this embodiment, the material of the first substrate 可 can be selected from the stone substrate or the glass substrate; please refer to steps 12 and 2B to form a first photoresist layer 120 on the first substrate 11 (1) the first upper surface m; refer to steps 13 and 2C, patterning the first photoresist layer 120 to form a plurality of first columnar photoresists 121; see steps 14 and 2d for a a reflow process (refl〇w), so that the first columnar photoresists 121 are formed with a plurality of first arcuate surfaces CS1. In this embodiment, the rejuvenation time of the first recursive step is The system is between 2 and 6 hours, and the reflow temperature of the first reflow step is between 175 and 300. (:; see steps 15 and 2E, the first seed layer is formed on the first arcuate surfaces csi of the first columnar photoresists 121, the first seed The material of the layer 130 may be selected from electrically conductive metal materials such as gold, silver, copper and aluminum; please refer to steps 16 and 2F to electroform a first metal material 140 on the first substrate 110. The first surface 141 has a first surface 141 and a second surface 142, and the second surface 142 is opposite to the first arcs of the first columnar photoresists 121. The surface CS1 is such that the second surface 142 of the first metal material 140 is formed with a plurality of arcuate recesses 143'. Preferably, the first metal material 14 is disposed on the first substrate 110. Before the step of the first upper surface 111, the first seed layer 130 is first sputtered to form the first seed layer 130 on the first singular surface CS1 of the first columnar photoresist 121, and the first metal material may be added. The adhesion of the first upper surface m of the first substrate 110; please refer to step 17 and FIG. 2 to remove the first substrate 110 and the first photoresist layer 12 To form a first mold M1', the first mold M1 is formed with the matte recesses 143 10 200946327. The first metal material 14 〇; see steps 18 and 211, providing a first substrate 15 〇, The second substrate 15 has a second upper surface 151 and a first lower surface 152. In this embodiment, the second substrate 15 is made of a material selected from the substrate or the glass substrate; Steps 9 and 21 form a second photoresist layer 16 on the second upper surface 151 of the second substrate 15; please refer to steps 20 and 2J to pattern the second photoresist layer 16 To form a plurality of second columnar photoresists 丨6丨; please refer to steps 2丨 and 2K, 〇 perform a second reflow step, so that the second columnar photoresists 161 are formed with a plurality of second arcs a surface CS2, in the second reflow step, the reflow time of the second reflow step is between 2 and 6 hours, and the reflow temperature of the second reflow step is between 175 and 30 (TC; Referring to steps 22 and 2], the second seed layer is formed on the second arcuate surface of the second columnar photoresist 161. The material of the second seed layer 170 may be selected from the conductive metal materials such as gold, silver, copper, and the like on the CS2; please refer to steps 23 and 2M, and electroform a second metal material. The second upper surface 151 ′ of the second substrate 150 covers the second curved surfaces CS2 of the second columnar photoresists 161 to form a second mold M2 . The second mold M2 has a plurality of arcuate protrusions 181, wherein the thickness of the first metal material 140 is greater than the second metal material 180°. In this embodiment, the second mold M2 has The second metal material 180 of the arcuate protrusions 181 is preferably prior to the step of electroforming the second metal material 180 on the second upper surface 151 of the second substrate 150. Sputtering the second seed layer 170 on the second singular surfaces CS2 of the second ridges 161 to increase the second gold 200946327 genus 180 to the second substrate 150 Adhesion of the upper surface 151; referring to steps 24 and 2N, a transparent substrate 210 is provided, the transparent substrate 210 having a first exposed surface 211 and a first In the present embodiment, the material of the transparent substrate 2 10 may be selected from glass or a highly transparent polymer material; please refer to steps 25 and 20 to press the first mold M1 The first exposed surface 211 of the transparent substrate 210 and the second 0 exposed surface 212' of the transparent substrate 210 are pressed in the embodiment, due to the second mold The M2 is disposed on the second upper surface 151 of the second substrate 15 , so that when the second mold M2 is pressed against the second exposed surface 212 of the transparent substrate 21 , the second is pressed The substrate i 50 is disposed on the second exposed surface 212 of the transparent substrate 21 to press the second mold M2 to the second exposed surface 212 of the transparent substrate 21; see FIG. 3 The first exposed surface 211 of the transparent substrate 21 is formed with a plurality of micro convex lenses 213 and the second exposed surface 212 is formed with a plurality of micro concave lenses 214 to form a light guide plate 200 having a micro concave and convex mirror. In this embodiment, the diameters of the micro concave lenses 214 and the micro convex lenses 213 are between 18402 and 22 613 micrometers (μιη). The slightly concave lens system 214 between the central thickness (center thickness) of the micro lens 213! Between 2 and 34 μm (μη〇, the distance between the micro concave lens 214 and the micro convex lens 213 is between 1 mm. The present invention utilizes the first reflow step and the second reflow step to make the first The mold M1 and the second mold M2 respectively have the arcuate concave portions 143 and the arcuate convex portions 181, so that the first convex surface 21 of the transparent substrate 21 is formed with the micro convex lenses 2ί3 and the first The second exposure 12 200946327 surface 212 is formed with the micro concave lens 214 to form the light guide plate 200 having the micro concave and convex lens, which has the advantages of simple process, and the micro convex lens 213 of the light guide plate 200 having the micro concave and convex lens and the micro concave lens 214, the light passing through the light guide plate 2 (8) having the micro concave-convex lens can be uniformly scattered, and the arrangement of the diffusion film is omitted, thereby reducing the cost. The scope of protection of the present invention is determined by the scope of the appended patent application. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the invention.圊: A flow chart of a method of manufacturing a light guide plate having a micro concave-convex lens according to an embodiment of the present invention. 2A to 20: a light guide plate having a micro concave-convex lens according to an embodiment of the present invention FIG. 3 is a schematic cross-sectional view of a light guide plate having a micro concave-convex lens according to an embodiment of the present invention. [Description of Main Components] 11 Providing a first substrate 12 to form a The first photoresist layer is patterned on the first substrate 13 to form a plurality of first columnar lights and 14 is subjected to a first reflow step '15 sputtering to form a first seed layer. On the first curved surfaces of the first columnar photoresists 13 200946327 16 17 18 19 20 21 22 electroforming a first metal material to remove the first substrate and the first light on the first substrate The resist layer provides a second substrate to form a second photoresist layer on the second substrate to form a first mold to pattern the second "resist layer to form a plurality of second columnar photoresists for a second back Welding step

Sputtering forming a second seed layer on the first arcuate surfaces of the second columnar photoresists 23 24 to form a second metal material on the second substrate to provide a light transmissive substrate, the light transmission The substrate has a first exposed surface and a second exposed surface

Pressing the first mold to the first exposed surface of the transparent substrate and the second mold to the second exposed surface 110 of the transparent substrate, the first substrate 120, the first photoresist layer 140 a metal material 143 arcuate recess 152 second lower surface 170 second seed layer 200 with micro concave and convex lens light guide plate 210 light transmissive substrate 211 first exposed surface 213 micro convex lens 214 micro concave lens D diameter M2 second mold ill first Surface 121 first columnar photoresist M1 first surface 150 second substrate 160 second photoresist layer 180 second metal material h center thickness CS1 first arcuate surface 112 first lower surface 130 first seed layer 142 second Surface 151 second upper surface 1 6 1 second columnar photoresist 1 8 1 arcuate convex portion 2 1 2 second exposed surface

Ml first mold CS2 first curved surface 14

Claims (1)

200946327 X. Patent Application Range: 1. A method for manufacturing a light guide plate having a micro concave-convex lens, comprising: providing a first substrate having a first upper surface and a first lower surface; Forming a first photoresist layer on the first upper surface of the first substrate; patterning the first photoresist layer to form a plurality of first columnar photoresists; and performing a first reflow (reflow) a step of forming the first columnar photoresists with a plurality of first arcuate surfaces; electroforming a first metal material on the first upper surface of the first substrate 'the first metal layer, Having a first surface and a third surface, the second surface facing the first arcuate surfaces of the first meandering photoresists, such that the second surface of the first metal material is formed with a plurality of An arc-shaped recess; removing the D-thinking material and the first photoresist layer to form a first mold 丨' providing a first substrate, the second substrate having a second upper surface and a second a lower surface; forming a second photoresist layer on the second upper surface of the second substrate; The second photoresist layer is formed to form a plurality of second columnar photoresists; and a second reflow step is performed to form the second columnar photoresists to form a plurality of second arcuate surfaces Electroforming a second metal material on the second upper surface of the second substrate, the first metal material covering the second arcs of the second columnar photoresists, and the surface U forming a second chess piece The second mold has a plurality of 15 200946327 arcuate protrusions; a transparent substrate is provided, the light transmissive substrate has a first exposed surface and a second exposed surface; and the first mold is pressed against the The first exposed surface of the transparent substrate and the second mold are pressed against the second exposed surface of the transparent substrate, so that the first exposed surface of the transparent substrate is formed with a plurality of micro convex lenses and the second The exposed surface is formed with a plurality of micro concave lenses. Ο 2. The method of manufacturing a light guide plate having a micro meniscus lens according to claim 1, wherein before the step of electroforming the first metal material on the first upper surface of the first substrate, There is: a sputtering formation - a first seed layer on the first orphan surfaces of the first columnar photoresists. 3. The method of manufacturing a light guide plate having a micro meniscus lens according to the invention of claim 2, wherein before the step of electroforming the second metal material on the second upper surface of the second substrate, Sputtering forms a second seed layer on the second arcuate surfaces of the second columnar photoresists. The method for fabricating a light guide plate having a micro meniscus lens according to the invention of claim 4, wherein the thickness of the first metal material is greater than the first metal material. The method for manufacturing a light guide plate having a micro concave-convex lens according to Item 1, wherein the diameter of the micro concave lens and the micro convex lens is 184 〇 2 as in the patent application range to 22.613 μm (μηι) between. The method for manufacturing a light guide plate having a micro meniscus lens, wherein the center thickness of the micro concave lens and the micro convex lens is between 1.2 and 34 micrometers. 7. The method of manufacturing a light guide plate having a micro meniscus lens according to claim 1, wherein the reflow time is between 2 and 6 hours in the first reflow step and the second reflow step. . 8. The method of manufacturing a light guide plate having a micro meniscus lens according to claim 1, wherein the reflow temperature is between 175 and 〜 in the first reflow step and the second reflow step. 300 °C. 9. The method of manufacturing a light guide plate having a micro meniscus lens according to the invention of claim 2, wherein the material of the light-transmitting substrate is a polymer material. 1 〇 如 〇 〇 〇 〇 〇 〇 如 如 如 如 如 如 如 如 如 如 J J J J J J J J J J J J J J J J J J J J J J J J The substrate may be selected from a tantalum substrate or a glass substrate.