さまざまなアプリケーションにおいて、異種材料同士の接合のニーズが増えてきています。これらの接合には、接着剤や粘着テープなどを使用する手法が一般的ですが、レーザを用いることで、自由度の高い製品設計や工程数の削減への貢献が期待されています。
主にエポキシ系接着剤と呼ばれる熱硬化性のある接着剤を使用し、接着剤またはその周囲の接合材料に半導体レーザを照射することで、接着剤を硬化させることが可能です。
従来、UV接着剤が使用されていたカメラモジュールやスマートフォンといった、異種材同士の接合が求められるアプリケーションに対して、自由度の高い製品設計への貢献ができます。
※サンプルご提供:株式会社ADEKA様
両面粘着テープにレーザを当て、加熱することで接合強度を向上させることができます。 一般的な両面粘着テープは、張り付けたのちに加圧し続けることで接合することができますが、張り付けた際の気泡は加圧だけでは除去することができません。レーザを用いることで、この気泡を接合面から除去することができ、接合強度を向上させることができます。
テープ線幅が細くても強度の高い接合ができ、再加熱により剥離も可能であることから、歩留まり向上にも貢献できるため、液晶パネル関連のアプリケーションに適しています。
両面粘着テープに使用する粘着剤は、温度上昇時に粘着力が低下します。この特性を活かし、レーザを照射することで張り付けた両面粘着テープを剥離することが可能です。
※サンプルご提供:早川ゴム株式会社様
※サンプルご提供:早川ゴム株式会社様
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