Angular velocity mount arrangement

• US 20070044558A1
• Filed: 08/29/2006
• Published: 03/01/2007
• Est. Priority Date: 08/30/2005
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Ohta, Tameharu
• Granted Patent: US 7,497,117 B2
• Time in Patent Office: Days
• US Class Current: 73/493
• CPC Class Codes: G01C 19/56 Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/1305 Bipolar Junction Transistor [BJT]
• CPC Class Codes: H01L 2924/13091 Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
• CPC Class Codes: H01L 2924/19107 off-chip wires

Abstract

An angular velocity mount arrangement includes an angular velocity sensor and a mount member. The angular velocity sensor includes an oscillator, an angular velocity sensing element, a package, and a plurality of lead frames. The angular velocity sensing element senses an angular velocity based on an oscillation of the oscillator in a first axis direction. The mount member is arranged relative to the angular velocity sensor in a second axis direction, which is generally orthogonal to the first axis direction. The angular velocity sensor is mounted to the mount member through the plurality of lead frames. At least one extending segment is a middle segment of each of the plurality of lead frames and extends toward the mount member in the second axis direction. The at least one extending segment of each of the plurality of lead frames is able to oscillate in the first axis direction.

Claims

1. An angular velocity mount arrangement, comprising:

an angular velocity sensor, which includes;

an oscillator;

an angular velocity sensing element that senses an angular velocity based on an oscillation of the oscillator in a first axis direction;

a package that houses the angular velocity sensing element; and

a plurality of lead frames, each of which is electrically connected to the angular velocity sensing element; and

a mount member that is arranged relative to the angular velocity sensor in a second axis direction, which is generally orthogonal to the first axis direction, the angular velocity sensor being mounted to the mount member through the plurality of lead frames, wherein;

each of the plurality of lead frames includes;

a first end segment that is fixed to the package;

at least one extending segment that is a middle segment of each of the plurality of lead frames and extends toward the mount member in the second axis direction; and

a second end segment that is fixed to the mount member; and

the at least one extending segment of each of the plurality of lead frames is able to oscillate in the first axis direction.

2. The angular velocity mount arrangement according to claim 1, wherein the at least one extending segment of each of the plurality of lead frames is formed by bending each of the plurality of lead frames at a connection between the first end segment and the middle segment of each of the plurality of lead frames such that the middle segment of each of the plurality of lead frames extends toward the mount member.

3. The angular velocity mount arrangement according to claim 2, wherein the package includes:

a first face that faces the mount member;

a second face that is opposite from the first face, the first end segment of each of the plurality of lead frames being fixed to the second face of the package; and

an edge face, along which the at least one extending segment of each of the plurality of lead frames extends.

4. The angular velocity mount arrangement according to claim 1, wherein the angular velocity sensing element includes one side, on which the oscillator is provided, the one side of the angular velocity sensing element facing the mount member.

5. The angular velocity mount arrangement according to claim 1, wherein the at least one extending segment of each of the plurality of lead frames is narrower than the first end segment of each of the plurality of lead frames.

6. The angular velocity mount arrangement according to claim 1, wherein:

the at least one extending segment of each of the plurality of lead frames includes a first extending segment and a second extending segment of each of the plurality of lead frames;

each of the plurality of lead frames includes a bent shape that is located between the first end segment and the first extending segment, the bent shape including the second extending segment, which extends in the second axis direction; and

the second extending segment of each of the plurality of lead frames is able to oscillate in the first axis direction.

7. The angular velocity mount arrangement according to claim 1, wherein each of the plurality of lead frames includes a viscous member attached to a segment between the first and second end segments of each of the plurality of lead frames.

8. The angular velocity mount arrangement according to claim 7, wherein the viscous member is made of a resilient resin.

9. The angular velocity mount arrangement according to claim 8, wherein the viscous member includes a sheet-shaped silicone rubber.

10. The angular velocity mount arrangement according to claim 1, wherein each of the plurality of lead frames is brazed to the package by use of a silver filler material.

11. The angular velocity mount arrangement according to claim 1, wherein each of the plurality of lead frames is brazed to the package by use of a high-temperature solder.

12. The angular velocity mount arrangement according to claim 1, wherein the at least one extending segment of each of the plurality of lead frames is able to oscillate in the first axis direction due to a resilient characteristic of the at least one extending segment.

13. The angular velocity mount arrangement according to claim 3, wherein the second face of the package is provided generally perpendicular to the second axis direction.