PATENT CLAIM ANALYSIS

Application Number: 16006981
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-12
Patent Classification: ["257", "076000"]

Abstract:
An enhancement-mode transistor gate structure which includes a spacer layer of GaN disposed above a barrier layer, a first layer of pGaN above the spacer layer, an etch stop layer of p-type Al-containing column III-V material, for example, pAlGaN or pAlInGaN, disposed above the first p-GaN layer, and a second p-GaN layer, having a greater thickness than the first p-GaN layer, disposed over the etch stop layer. The etch stop layer minimizes damage to the underlying barrier layer during gate etching steps, and improves GaN spacer thickness uniformity.

Claim (Index 10):
A method of forming a transistor with a uniform spacer layer in areas surrounding the transistor gate, comprising:\n providing a transistor gate structure comprising:\n a barrier layer; \n a spacer layer disposed above the barrier layer, the spacer layer comprising a column III-V material; \n a first layer comprising p-type or compensated column III-V material disposed above the spacer layer; \n an etch stop layer comprising a p-type Al-containing column material disposed above the spacer layer and the first layer comprising p-type or compensated column III-V material; and \n a second layer comprising p-type or compensated column III-V material positioned above the etch stop layer, the second layer comprising p-type or compensated column III-V material being thicker than the first layer comprising p-type or compensated column III-V material; \n positioning a mask over a gate region of the second layer comprising p-type or compensated column III-V material; performing a first etch of the second layer comprising p-type or compensated column III-V material outside the gate region with an etch recipe that is selective to the p-type Al-containing column III-V material of the etch stop layer, such that the etch stops on the etch stop layer; performing a second etch through the mask with an etch recipe that is non-selective to the p-type Al-containing column III-V material of the etch stop layer, such that the etch stop layer and the first layer comprising p-type or compensated column III-V material are completely etched outside the gate region covered by the mask, and the spacer layer is partially etched outside the gate region covered by the mask.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 94.0
- Lexical Diversity: 1.94118
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['12756088', '13292487', '14445988', '12756960', '13403400']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9108941221350004
- 35 USC 102 Novelty (BERT): 0.5181833001310147
- Combined Prediction Score: 0.8716230399346019
- Mean Citation Score: 281.235038
- Max Citation Score: 291.93982
- Similarity Product: 204.4342433739185

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test