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Lens used for optical module

A technology for optical modules and lenses, which is applied in the field of lenses for optical modules, can solve the problems of low optical properties of resins, reduced optical properties of lenses, and damage to the transparency of norbornene-based resins, and achieves resistance to reflow soldering processes and excellent durability. thermal effect

Inactive Publication Date: 2010-06-09
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with this method, there is a problem that the original transparency of the norbornene-based resin is impaired due to the mixing of a large amount of inorganic particles.
[0005] In addition, in Patent Documents 2, 3, and 4, a method of manufacturing a reflow-resistant optical module lens using a thermosetting resin is proposed. For this method, due to the low optical characteristics of the resin and the uniqueness of the thermosetting resin, curing shrinkage, so there is a problem that the optical performance of the obtained lens decreases

Method used

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  • Lens used for optical module
  • Lens used for optical module
  • Lens used for optical module

Examples

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Embodiment

[0110] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited by these examples.

[0111] In the following examples and comparative examples, the reflow resistance of the obtained lens-shaped molded article, the thickness ratio of the cured layer, the TMA heat distortion temperature of the cured layer, and the stress strain of the lens were measured or evaluated as follows, respectively.

[0112] (1) Resistance to reflow soldering

[0113] Using a reflow furnace (STR-2010N2M-III type) manufactured by Senju Metal Industry Co., Ltd., it implemented as follows.

[0114] (temperature setting)

[0115] The temperature setting of the reflow furnace is set as follows according to JEDEC standard J·STD·020D.

[0116] Conveyor belt speed: 25.3cm / min

[0117] Temperature setting for each heating zone

[0118] Zone 1: 305°C

[0119] Zone 2: 240°C

[0120] Zone 3: 240°C

[0121] Zone 4: 245°C

[0122] Zone 5...

manufacture example 1

[0146] Using ARTON-F4520 (DSC-Tg: 160°C) manufactured by JSR Corporation as a cyclic olefin-based thermoplastic transparent resin, an injection molding machine (S-200i 50B manufactured by FANUC Corporation, cylinder diameter 22 mm, nozzle diameter 2.5 mm, clamping force 50 tons), injection molding according to the molding conditions shown in Table 1 figure 1 A lens for an optical module with a center thickness of 0.59mm is shown. In addition, the screw speed during metering is 25rpm, and the back pressure is 65kgf / cm 2 , The molding cycle is 50sec. Resin temperature indicates the maximum resin temperature in the barrel. Moreover, molding was performed 30 times after molding conditions were set, and the obtained lens was used as a product, and the molding (A) was obtained. The residual strain at the center of the molded body (A) was 43 MPa.

manufacture example 2

[0148] In Production Example 1, except that the cylinder temperature condition was changed so that the resin temperature was 310°C, it was performed in the same manner as Production Example 1, and injection molding was carried out under the molding conditions shown in Table 1. figure 1 Lenses shown with a center thickness of 0.59mm. After molding conditions were set, molding was performed 30 times, and the resulting lens was used as a product to obtain a molded body (B). The residual strain at the center of the molded body (B) was 101 MPa.

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Abstract

The invention relates to a lens used for optical module, aims to provide a lens used for optical module which has the intrinsic transparency and formability of the thermoplastic transparent resin, and also has excellent thermal endurance capable of enduring the reflow soldering process. The lens used for optical module of the invention is characterized in that: the surface of the lens shaped body made of thermoplastic transparent resin has a solidifying layer formed by heat or light solidification coating agent; the solidifying layer has a thickness of 1-100 mum and TMA thermal deformation temperature of above 300 degrees centigrade; the solidifying layer thickness rate in the formula is in the range of 3-15% at the center portion of the lens used for optical module, wherein solidifying layer thickness rate(%) = (solidifying layer thickness / lens thickness) X 100%.

Description

technical field [0001] The present invention relates to a lens for an optical module. Specifically, the present invention relates to a lens for an optical module having a curable resin layer excellent in heat resistance on the surface of a lens-shaped molded article. Background technique [0002] In the manufacture of electronic devices in recent years, a reflow soldering process is often used as a process for miniaturizing various electronic components and modules and mounting them on a chassis with good productivity. In the reflow soldering process, the electronic components on the chassis are heated at a high temperature of 220 to 270° C. for melting and adhesion of the solder. Therefore, durability against the reflow soldering process is also required for electronic modules, especially for optical components such as lenses, prisms, and transparent covers mounted on optical modules such as cameras and lamps. [0003] Lenses among these optical components are manufacture...

Claims

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Application Information

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IPC IPC(8): G02B3/00G02B1/04F21V5/04F21Y101/02
CPCB29D11/00903G02B1/041G02B13/001G02B19/0061
Inventor 林田大造奥村健志宫木伸行
Owner JSR CORPORATIOON
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