JPH03236974A - Liquid crystal mask printing method and apparatus therefor - Google Patents

Abstract

PURPOSE:To extend a printing range at the time of transferring the pattern of one liquid crystal mask to a printing surface by successively applying a light beam such as laser beam to the divided surfaces of the liquid crystal mask and by synthesizing the pattern of this liquid crystal mask on the printing surface and printing the pattern. CONSTITUTION:A laser beam projected from a laser oscillator 1 is formed into an almost rectangular shape by a beam-forming lens 6 and successively applied to form an image to the divided surfaces A, B, C of a liquid crystal mask 3 by a scanner mirror 7, and the patterns of respective divided surface A, B, C parts of said liquid crystal mask 3 are printed on the printing surface 5 in the manner of successively deviating in position. The number of division of said liquid crystal mask 3 is not limited to 3 but can be further increased to 5 or 10, and the printing range can be extended according to the number of division.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing method and apparatus using a liquid crystal mask.

[Conventional technology]

A liquid crystal mask such as a scattering type can express a large amount of character or graphic information on one pattern by increasing the number of pattern divisions.

However, in the conventional printing method and apparatus using a liquid crystal mask, as shown in FIG. The transmitted light is condensed by an imaging lens 4 and printed on a printing surface 5 in one shot.

[Problem to be solved by the invention]

The printing range in the above conventional example is determined by the laser output and the material of the printing surface 5, and it was possible to print only in a fairly narrow range.

For example, 0. When printing on a phenolic resin IC package with a 1 m5ec% 4 J/P laser,
The printing range is at most 3x12m (36mm2).

One way to increase the printing range is to use a high-output laser, but the entire device becomes expensive and is not practical.

In the conventional printing method described above, even if a lot of character information is expressed on the button of the liquid crystal mask, each character becomes very small and difficult to read, resulting in a situation where the characteristics of the liquid crystal mask cannot be utilized. .

The present invention has been made in view of the above, and provides a liquid crystal mask printing method and apparatus thereof that can widen the printing range when transferring the pattern of one liquid crystal mask onto a printing surface. The purpose is to

[Means to solve the problem]

In order to achieve the above object, the liquid crystal mask printing method according to the present invention sequentially irradiates the divided surfaces of the liquid crystal mask with a light beam such as a laser beam, and synthesizes the pattern on the liquid crystal mask onto the printing surface. to print.

The device also includes a light beam shaping means between a light beam generation source such as a laser oscillator and the liquid crystal mask, and a light beam shaped by the light beam shaping means is selectively applied to the divided planes of the liquid crystal mask. The configuration includes a mirror for selecting the irradiation position that irradiates the area.

〔Example〕

Embodiments of the present invention will be described with reference to FIGS. 1 to 3.

Between the laser oscillator 1 and the liquid crystal mask 3, there is a beam shaping lens 6 that shapes the laser beam emitted from the laser oscillator 1 into a substantially rectangular shape, and the laser beam that has passed through the beam shaping lens 6 is shaped onto the surface of the liquid crystal mask 3. , for example, ASB, C 3
A scanner mirror 7 is interposed to sequentially illuminate each divided surface.

The laser beam emitted from the laser oscillator 1 is shaped into a substantially rectangular shape by a beam shaping lens 6 and then passed through a scanner mirror 7 to the dividing planes A, B, and C of the liquid crystal mask 3.
are sequentially imaged and irradiated, and the above-mentioned liquid crystal mask 3 is placed on the printing surface 5.
The patterns on each of the divided planes A, B, and C are printed with their positions shifted sequentially.

The number of divisions on the liquid crystal mask 3 is not limited to three, but can be further increased to five or ten, and the printing range can be expanded according to the number of divisions.

FIG. 2 shows the other side of the liquid crystal mask printing device, in which a cylindrical mirror 8 and a cylindrical scanner mirror 9 are interposed between the laser oscillator 1 and the liquid crystal mask 3 in order to shape the laser beam into a substantially rectangular shape. A cylindrical scanner mirror 9 irradiates the liquid crystal mask 3 with a laser beam in parts.

The divided irradiation pattern on the liquid crystal mask 3 is also shown in Figs. 1 and 2.
In addition to what is shown in the figure, as shown in FIG. 3, irradiation may be performed in a lattice frame.

Next, a specific embodiment of the present invention will be described using an example shown in FIG.

(1) Laser YAG pulse laser, 0.1mm, 4J/P.

Beam diameter 1.0 mm (2) Beam shaping lens cylindrical lens, f=150 (3) 2 scanner mirrors, mirror shape 20 x 35 +++m (4) Liquid crystal mask pattern section, 70 x 70 +n+n (5) Imaging lens Diameter 120m, Meniscus lens (6) Number of irradiation divisions Divided into 6 in a grid pattern Irradiation printing was performed on the printing surface of phenolic resin under the above conditions, 8×
8 times, 6 times the printing size, that is, 24X], and 6 mm printing was possible.

[Effects of the Invention] According to the present invention, the printing area per divided irradiation can be the same as that of the conventional method, so by combining the divided irradiations, it is possible to print over a wide range as a result. can.

[Brief explanation of drawings]

1 and 2 are schematic explanatory diagrams showing different embodiments of the present invention, and FIG. 3 is an irradiation pattern diagram. FIG. 4 is a schematic explanatory diagram showing a conventional example. ] is a laser oscillator, 3 is a liquid crystal mask, 5 is a printing surface, 6 is a beam shaping lens, 7 is a scanner mirror, 8 is a cylindrical mirror, 9 is a cylindrical scanner mirror

Claims (2)

[Claims] (1) A liquid crystal display characterized in that a light beam such as a laser beam 1 is sequentially irradiated onto the divided surfaces of the liquid crystal mask 3, and the patterns on the liquid crystal mask 3 are combined and printed on the printing surface 5. Mask printing method. (2) A light beam shaping means is provided between the light beam generation source such as the laser oscillator 1 and the liquid crystal mask 3, and the light beam shaped by the light beam shaping means is sequentially selected onto the divided plane of the liquid crystal mask 3. A liquid crystal mask printing device characterized by interposing a mirror for selecting an irradiation position to irradiate a target.