Patent ID: 7230251

Claim:
A method of manufacturing an electron beam lens comprising: focusing a light onto a region with a shape of a first hollowed space to form an activated region on a central portion of a first photosensitive glass substrate; forming a first seed metal layer on a first surface of the first photosensitive glass substrate and forming a second seed metal layer on a second surface of the first photosensitive glass substrate; forming a first resist pattern with a shape of a first hole on the first seed metal layer; forming a second resist pattern with a shape of a second hole that is aligned with the first resist pattern on the second seed metal layer; forming a first metal plating layer on a portion of the first seed metal layer exposed by the first resist pattern; forming a second metal plating layer on a portion of the second seed metal layer exposed by the second resist pattern; removing the first and the second resist patterns using a lift off method; forming first and second thin metal films having the first hole and the second hole, respectively, by removing portions of the seed metal layers that were covered by the first and second resist patterns; forming a first hollowed space by etching the activated region of the first photosensitive glass substrate; focusing a light onto a region with a shape of a second hollowed space to form an activated region of a central portion of a second photosensitive glass substrate; forming a third thin metal plating layer that exposes a second hollowed space on first surface of the second photosensitive glass substrate and forming a third seed metal layer on a second surface of the second photosensitive glass substrate; bonding the second thin metal film of the first photosensitive glass substrate and the third thin metal film of the second photosensitive glass substrate using a eutectic bonding method; forming a third resist pattern with a shape of a third hole that is aligned with the first and second resist patterns on the third seed metal layer; forming a third metal plating layer on a portion of the third seed metal layer exposed by the third resist pattern; removing the third resist pattern using a lift off method; forming a third thin metal film having the third hole by removing a portion of the third seed metal layer that is covered by the third resist pattern; and forming a second hollowed space by etching the activated region of the second photosensitive glass substrate.