Lateral transistor with extended source finger contact
AssigneeSemiconductor Components Industries, LLC
InventorWoochul JEON
Life of this patent
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Abstract
Semiconductor devices, such as a lateral HEMT, may display current flow between a plurality of interdigitated source fingers and drain fingers, and controlled by a common gate connection. An extended source finger contact may enable improved voltage control across the source fingers, even for large devices with many and/or lengthy source fingers. In this way, unwanted subthreshold operations and switching oscillations may be avoided by reliably maintaining a source voltage at a desired level, to thereby provide fast and reliable switching.
Claims20
A semiconductor device, comprising:
- a source pad connected to a plurality of source fingers;
- a drain pad connected to a plurality of drain fingers that are interdigitated with the plurality of source fingers;
- a gate pad connected to a gate and to a gate feed that extends at least partially around the source pad and the drain pad;
- and
- an extended source finger contact connected to the source pad and to a source finger of the plurality of source fingers, and extending in parallel with the source finger.
A semiconductor device, comprising:
- a plurality of drain fingers;
- a drain pad connected to the plurality of drain fingers;
- a plurality of source fingers that are parallel to, and interdigitated with, the plurality of drain fingers;
- a source pad connected to the plurality of source fingers;
- a gate pad connected to a gate feed that extends around at least a portion of the source pad or the drain pad;
- and
- an extended source finger contact connected to the source pad and extending in a direction of the drain pad, and at least partially within the gate feed.
A method of making a semiconductor device, comprising:
- connecting a source pad to a plurality of source fingers;
- connecting a drain pad connected a plurality of drain fingers that are interdigitated with the plurality of source fingers;
- connecting a gate pad to a gate and to a gate feed that extends at least partially around the source pad and the drain pad;
- and
- connecting an extended source finger contact to the source pad and to a source finger of the plurality of source fingers, and extending in parallel with the source finger in a direction of the drain pad.
Dependencies are inferred from the claim text.