Press pack power semiconductor device with locator strip
AssigneeLittelfuse, Inc.
InventorsThomas Spann, Joseph Geo
Life of this patent
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Abstract
A press pack power semiconductor device can include a housing, a semiconductor, and a locator strip deformed into a ring-like shape to concentrically fit within the housing and concentrically locate at least part of the semiconductor therein. The locator strip can include a first plurality of regions regularly interspersed with a second plurality of regions along a length of the locator strip, and each of the first plurality of regions can have a first cross-sectional area that can be smaller than a second cross-sectional area of each of the second plurality of regions.
Claims15
A press pack power semiconductor device comprising:
- a housing;
- a semiconductor;
- and
- a locator strip deformed into a ring-like shape to concentrically fit within the housing and concentrically locate at least part of the semiconductor therein,
- wherein the locator strip includes a first plurality of regions regularly interspersed with a second plurality of regions along a length of the locator strip, and
- wherein each of the first plurality of regions has a first cross-sectional area that is smaller than a second cross-sectional area of each of the second plurality of regions,
- wherein each of the first plurality of regions includes a first trench on a first side of the locator strip,
- wherein each of the first plurality of regions includes a second trench on a second side of the locator strip, and
- wherein the second side of the locator strip is opposite the first side of the locator strip.
A locator strip comprising:
- a polymer sheet that includes a first plurality of regions regularly interspersed with a second plurality of regions along a length of the polymer sheet,
- wherein each of the first plurality of regions has a first cross-sectional area that is smaller than a second cross-sectional area of each of the second plurality of regions, and
- wherein the polymer sheet is deformable into a ring-like shape to concentrically fit within a housing of a press pack power semiconductor device and concentrically locate a semiconductor therein,
- wherein each of the first plurality of regions includes a first trench on a first side of the polymer sheet,
- wherein each of the first plurality of regions includes a second trench on a second side of the polymer sheet, and
- wherein the second side of the polymer sheet is opposite the first side of the polymer sheet.
A method comprising:
- weakening a first plurality of regions of a locator strip relative to a second plurality of regions of the locator strip with a first trench on a first side of the locator strip and a second trench on a second side of the locator strip;
- deforming the locator strip into a ring-like shape;
- concentrically fitting the ring-like shape of the locator strip within a housing;
- and
- concentrically locating a semiconductor within the ring-like shape of the locator strip,
- wherein the first plurality of regions are regularly interspersed with the second plurality of regions along a length of the locator strip,
- wherein each of the first plurality of regions has a first cross-sectional area that is smaller than a second cross-sectional area of each of the second plurality of regions, and
- wherein the second side of the locator strip is opposite the first side of the locator strip.
Dependencies are inferred from the claim text.