US 8,558,368 B2 · Bi-directional, reverse blocking battery switch

Abstract

Embodiments of the present invention relate to an improved package for a bi-directional and reverse blocking battery switch. According to one embodiment, two switches are oriented side-by-side, rather than end-to-end, in a die package. This configuration reduces the total switch resistance for a given die area, often reducing the resistance enough to avoid the use of backmetal in order to meet resistance specifications. Elimination of backmetal reduces the overall cost of the die package and removes the potential failure modes associated with the manufacture of backmetal. Embodiments of the present invention may also allow for more pin connections and an increased pin pitch. This results in redundant connections for higher current connections, thereby reducing electrical and thermal resistance and minimizing the costs of manufacture or implementation of the die package.

Claims18

Dependent claims

A method of packaging an integrated circuit having a first vertical MOSFET and a second vertical MOSFET, the method comprising:

encapsulating the integrated circuit within a package body, the package body having an outer surface with a first dimension and a second dimension longer than the first dimension;
and
disposing a first plurality of pin connections and a second plurality of pin connections along a length of the second dimension on respective opposite sides of the package body, such that:
each of the first plurality of pin connections are electrically connected to one of a first plurality of contacts disposed on a single side of a semiconductor die in which the first vertical MOSFET is disposed, the first plurality of contacts comprising a drain contact, a gate contact, and a source contact of the first vertical MOSFET;
and
each of the second plurality of pin connections are electrically connected to one of a second plurality of contacts disposed on a single side of a semiconductor die in which the second vertical MOSFET is disposed, the second plurality of contacts comprising a drain contact, a gate contact, and a source contact of the second vertical MOSFET.

3 more elements

Dependencies are inferred from the claim text.

Bi-directional, reverse blocking battery switch

Life of this patent

Bi-directional, reverse blocking battery switch

Life of this patent

Abstract

Claims18