Camera module for compact electronic equipments
View Patent ↗In a camera module of a so-called multi-chip type, an imaging device and a semiconductor element for processing are mounted. The semiconductor element is encapsulated by a mold resin. Protruding parts are formed by the mold resin on a mounting surface of the mold resin. A metal film forming a pattern wiring is formed on the mounting surface of the mold resin. The metal film is also formed on the protruding parts so as to constitute external connection terminals together with the protruding parts. Electrodes of the semiconductor element are electrically connected to the pattern wiring. The protruding parts include first protruding parts positioned around the semiconductor element and second protruding parts formed in a mounting area of the semiconductor element on the mounting surface.
1. A camera module comprising:
a lens holder carrying an image-pickup lens;
a molded body to which the lens holder is attached;
protruding parts formed on a mounting surface of said molded body;
a metal film, formed on said protruding parts, forming a pattern wiring on the mounting surface of said molded body so as to constitute external connection terminals together with said protruding parts;
a semiconductor element embedded in said molded body;
an imaging device mounted on the mounting surface of said molded body and having an imaging surface facing said image-pickup lens through an opening of said molded body; and
a wiring board to which said molded body is mounted,
wherein the electrodes of said semiconductor element are electrically connected to said pattern wiring, and said protruding parts include first protruding parts formed directly and entirely under the semiconductor element and second protruding parts located around said semiconductor element, and
the metal film formed on said first protruding parts is extended to a position around said semiconductor element by said pattern wiring, so that a part of said pattern wiring is located directly under said semiconductor element and is connected to the metal film formed on said first protruding parts.
2. The camera module as claimed in claim 1 , wherein a second resin different from said mold resin is located between the semiconductor element and the first protruding parts so that said first protruding parts are formed by said second resin.
3. The camera module as claimed in claim 2 , wherein the electrodes of said semiconductor element are connected to said pattern wiring by metal wires, and said second resin serves as a resin for fixing said semiconductor element.
4. The camera module as claimed in claim 2 , wherein the electrodes of said semiconductor element are protruding electrodes, said semiconductor element is flip-chip connected to said pattern wiring, and said second resin is an under-fill material.
5. The camera module as claimed in claim 1 , wherein said second protruding parts include dummy protruding parts arranged in the vicinity of a periphery of said semiconductor element, and the metal film formed on the dummy protruding parts is isolated from said wiring pattern.
6. The camera module as claimed in claim 1 , further comprising bonding pads exposed on the bottom surface of said molded body so that electrodes of said imaging device are connected to the bonding pads.