Optical sensor, scanner unit, and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShunsuke Tanaka, Kazunari Fujii
Life of this patent
Estimating the term…
Abstract
An optical sensor includes a bare chip mounted on a circuit board, a protection member configured to protect the bare chip, a pad connected to the bare chip via a wire, and a pattern connecting the pad and a terminal portion at an edge of the circuit board to each other. The pattern is connected to the terminal portion on a same surface as a surface on which the bare chip is mounted, and a portion of the pattern between the protection member and the terminal portion is covered with solder resist.
Claims15
An optical sensor comprising:
- a circuit board;
- a bare chip mounted on the circuit board;
- a protection member configured to protect the bare chip;
- a pad connected to the bare chip via a wire;
- a through-hole formed through the circuit board;
- and
- a pattern connected to the pad via the through-hole,
- wherein the pattern is connected to the through-hole on an opposite surface of a surface on which the bare chip is mounted, and is connected to the pad via the through-hole.
A scanner unit comprising:
- a light emission element;
- a mirror configured to reflect light emitted from the light emission element;
- and
- an optical sensor configured to detect the light reflected by the mirror,
- the optical sensor including
- a circuit board,
- a bare chip mounted on the circuit board,
- a protection member configured to protect the bare chip,
- a pad connected to the bare chip via a wire, and
- a pattern connecting the pad and a terminal portion at an edge of the circuit board to each other,
- wherein the pattern is connected to a through-hole on an opposite surface of a surface on which the bare chip is mounted, and is connected to the pad via the through-hole.
An image forming apparatus comprising:
- an image bearing member configured to allow an image to be formed thereon;
- a scanner unit configured to irradiate the image bearing member with light to form a latent image on the image bearing member,
- the scanner unit including
- a light emission element,
- a mirror configured to reflect the light emitted from the light emission element, and
- an optical sensor configured to detect the light reflected by the mirror, the optical sensor including
- a circuit board,
- a bare chip mounted on the circuit board,
- a protection member configured to protect the bare chip,
- a pad connected to the bare chip via a wire, and
- a pattern connecting the pad and a terminal portion at an edge of the circuit board to each other,
- wherein the pattern is connected to a through-hole on an opposite surface of a surface on which the bare chip is mounted, and is connected to the pad via the through-hole;
- a development unit configured to develop the latent image formed on the image bearing member;
- and
- a transfer unit configured to transfer an image developed by the development unit onto a sheet.
An optical sensor comprising:
- a circuit board;
- a chip mounted on the circuit board and including a light receiving element;
- a pad electrically connected to the chip;
- a conductive pattern mounted on an opposite surface of a surface on which the chip is mounted in the circuit board;
- and
- a through-hole connecting the pad and the conductive pattern.
Dependencies are inferred from the claim text.