Base design for self-centering

• US 8,069,739 B2
• Filed: 11/04/2009
• Issued: 12/06/2011
• Est. Priority Date: 05/28/2003
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Woersinger, Juergen, Mast, Martin, Stratmann, Andreas, Muehlheim, Richard, Grote, Regina, Spiegel, Hans-Juergen
• Primary Examiner(s): RAEVIS, ROBERT R
• Application Number:
  US12/612,393
• Publication Number:
  US 20100107786A1
• Time in Patent Office: 762 Days
• Field of Search: None
• US Class Current: 73/866.5
• CPC Class Codes: G01D 11/245 Housings for sensors
• CPC Class Codes: G01L 19/14 Housings G01L19/0007, G01L19/0084, G01L19/0092, G01L19/04, G01L19/06 take precedence
• CPC Class Codes: G01L 19/143 Two part housings
• CPC Class Codes: H01L 2224/49113 the connectors connecting different bonding areas on the semiconductor or solid-state body to a common bonding area outside the body, e.g. converging wires
• CPC Class Codes: H01L 2224/49171 Fan-out arrangements
• CPC Class Codes: H01L 23/045 the other leads having an insulating passage through the base
• CPC Class Codes: H01L 23/10 characterised by the material or arrangement of seals between parts, e.g. between cap and base of the container or between leads and walls of the container
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

A device having at least one housing and one bottom connected to the housing. In this context, the housing has a housing wall and the bottom at least one base. Further it is provided for the base to have a specifiable edge. The essence of the present arrangement now lies in the fact that the edge of the base has at least two regions, a first region being situated closer to the housing wall and a second region being further removed from the housing wall.

Claims

1. A device, comprising:

a housing having a housing wall;

a bottom connected to the housing and having at least one base, the base having an edge,

wherein;

the device is manufactured to provide the edge of the base with a plurality of first predetermined regions and a plurality of second predetermined regions, a distance of each of the first regions from the housing wall being substantially less than a greatest distance of each of the second regions from the housing wall within a single plane that is perpendicular to a central axis, the central axis extending between a top and a bottom of the housing and into the base;

a height of the housing wall between the top and the bottom of the housing is substantially greater than a height of the base;

the first regions of the base center the housing on the base by contacting the housing wall;

free volumes disposed between locations of contact between the first regions and the housing wall are filled with a passivating material; and

the device is a micromechanical sensor.

2. The device as recited in claim 1, wherein:

the one or more first regions include eight first regions and the one or more second regions include eight second regions;

the edge of the base is made up alternately of the first regions and the second regions; and

the first regions and the second regions are arranged symmetrically with respect to a center of the base on the edge of the base.

3. The device as recited in claim 1, wherein:

the edge is a surface that extends, in a direction perpendicular to the central axis, to surround the central axis; and

each of the one or more first regions includes one of a ridge, an angle, a corner, and a point formed by a meeting of respective extensions extending from two sections of a respective one of the one or more second regions of the surface, the two sections of the surface being one of flat and rounded.

4. The device as recited in claim 1, wherein a direct contact exists between the housing wall and the base only in at least the first regions.

5. The device as recited in claim 1, wherein:

the edge is a surface that extends, in a direction perpendicular to the central axis and in planes parallel to the central axis, to surround the central axis; and

the passivating material fills all space between the edge and the housing wall that existed prior to introduction of the passivating material.

6. The device as recited in claim 1, wherein:

the passivating material covers the base at least partially, such that the passivating material covers the edge and a part of an upper side of the base.

7. The device as recited in claim 1, wherein:

the bottom includes a sensor element that detects an operating variable representing at least one of;

an operating parameter of a medium adjoining the sensor element; and

a state parameter of the sensor element;

the operating parameter includes at least one of a pressure, a pressure difference, a temperature, a density, and a flow velocity; and

the state parameter includes at least one of a velocity, an acceleration, a rotation, and a yawing motion.

8. The device as recited in claim 7, further comprising:

pins that contact the sensor element through the base.

9. The device as recited in claim 7, wherein the state parameter includes at least one of the velocity, the acceleration, and the yawing motion.

10. The device as recited in claim 1, wherein the manufacturing of the edge of the base with the one or more first and one or more second predetermined regions provides the edge with a shape usable for centering the housing on the bottom.

11. The device as recited in claim 1, wherein the bottom includes a portion that extends radially outward beyond the edge.

12. A device, comprising:

a housing having a housing wall;

a bottom connected to the housing and having at least one base, the base having an edge;

wherein;

the device is manufactured to provide the edge of the base with a plurality of first predetermined regions and a plurality of second predetermined regions, each of the first regions being substantially closer to the housing wall than each of the second regions within a single plane that is perpendicular to a central axis, the central axis extending between a top and a bottom of the housing and into the base;

the bottom includes a sensor element that detects and outputs an operating variable representing at least one of;

an operating parameter of a medium adjoining the sensor element; and

a state parameter of the sensor element;

the operating parameter includes at least one of a pressure, a pressure difference, a temperature, a density, and a flow velocity;

the state parameter includes at least one of a velocity, an acceleration, a rotation, and a yawing motion;

the first regions of the base center the housing on the base by contacting the housing wall;

free volumes disposed between locations of contact between the first regions and the housing wall are filled with a passivating material; and

the device is a micromechanical sensor.

13. The device as recited in claim 12, wherein the state parameter includes at least one of the velocity, the acceleration, and the yawing motion.

14. A method for manufacturing a device, comprising:

providing a housing having a housing wall;

providing a bottom connected to the housing and having at least one base, the base having an edge, wherein;

the providing of the bottom is performed in a manner that results in formation of the edge with a plurality of first predetermined regions and a plurality of second predetermined regions, a distance of each of the first regions from the housing wall being substantially less than a greatest distance of each of the second regions from the housing wall within a single plane that is perpendicular to a central axis, the central axis extending between a top and a bottom of the housing and into the base;

a height of the housing wall between the top and the bottom of the housing is substantially greater than a height of the base;

the first regions of the base center the housing on the base by contacting the housing wall;

free volumes disposed between locations of contact between the first regions and the housing wall are filled with a passivating material; and

the device is a micromechanical sensor.

15. The method as recited in claim 14, wherein the passivating material minimizes inclusions of at least one of air and hollow spaces in the free volumes.

16. The method as recited in claim 14, wherein the formation of the edge with one or more first and one or more second predetermined regions provides the edge with a predetermined shape, the method further comprising:

using the shape to center the housing on the bottom.