Magnetic sensor with components attached to transparent plate for laser trimming during calibration
First Claim
1. A magnetic sensor, comprising:
- a permanent magnet structure;
a magnetically sensitive component having a first surface and a second surface;
a plate which is transparent to a preselected type of radiation, said first surface of said magnetically sensitive component being attached to said plate, said magnetically sensitive component being disposed between said permanent magnet structure and said plate; and
a plurality of conductive elements disposed on a surface of said plate, said plurality of conductive elements being connected in electrical communication between preselected portions of said first surface of said magnetically sensitive component.
1 Assignment
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Accused Products
Abstract
A magnetic sensor is provided with a permanent magnet structure, a magnetically sensitive component and a transparent plate through which the magnetically sensitive component can be selectively trimmed by a laser beam through the transparent plate. The magnetically sensitive component is attached to an under surface of the plate which is provided with conductive runs, conductive circuit points and conductive pads. The magnetically sensitive component is provided with solder bumps that are soldered to the conductive circuit points on the under surface of the transparent plate. The magnetically sensitive component is rigidly attached to the permanent magnet structure by an epoxy or other suitable material. This disposes the magnetically sensitive component between the transparent plate and the permanent magnet structure. The magnetically sensitive component can be calibrated by laser trimming resistors on an integrated chip through the transparent plate.
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Citations
20 Claims
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1. A magnetic sensor, comprising:
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a permanent magnet structure; a magnetically sensitive component having a first surface and a second surface; a plate which is transparent to a preselected type of radiation, said first surface of said magnetically sensitive component being attached to said plate, said magnetically sensitive component being disposed between said permanent magnet structure and said plate; and a plurality of conductive elements disposed on a surface of said plate, said plurality of conductive elements being connected in electrical communication between preselected portions of said first surface of said magnetically sensitive component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A magnetic sensor, comprising:
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a permanent magnet structure; a magnetically sensitive component having a first surface and a second surface; a plate which is transparent to a preselected type of radiation, said first surface of said magnetically sensitive component being attached to said plate, said magnetically sensitive component being disposed between said permanent magnet structure and said plate; and a plurality of conductive elements disposed on a surface of said plate, said plurality of conductive elements being connected in electrical communication between preselected portions of said first surface of said magnetically sensitive component, said magnetically sensitive component being attached to said plate by solder. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A magnetic sensor, comprising:
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a permanent magnet structure, said permanent magnet structure comprising a permanent magnet and a pole piece disposed on a pole face of said permanent magnet; a magnetically sensitive component having a first surface and a second surface; a plate which is transparent to a preselected type of radiation, said first surface of said magnetically sensitive component being attached to said plate, said magnetically sensitive component being disposed between said permanent magnet structure and said plate; and a plurality of conductive elements disposed on a surface of said plate, said plurality of conductive elements being connected in electrical communication between preselected portions of said first surface of said magnetically sensitive component, said magnetically sensitive component being attached to said plate by solder, said magnetically sensitive component comprising a plurality of individual chips, each of said plurality of chips being attached to said plate. - View Dependent Claims (20)
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Specification