PATENT CLAIM ANALYSIS

Application Number: 15922611
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-04
Patent Classification: ["372", "050110"]

Abstract:
A structure of distributed feedback (DFB) laser includes a grating layer having a phase-shift grating structure and a gratingless area. In addition, both side-surfaces of the DFB laser are coated with anti-reflection coating to improve SMSR and to obtain good slope efficiency (SE). The grating layer is divided by the phase-shift grating structure in a horizontal direction into a first grating area and a second grating area adjacent to a laser-out surface of the DFB laser. The phase-shift grating structure provides a phase-difference distance, such that a shift of phase exists between the micro-grating structures located within the first grating area and the other micro-grating structures located within the second grating area. The gratingless area located within the second grating area contains no micro-grating structure, and moreover, the gratingless area will not change the phase of the micro-grating structures located within the second grating area.

Claim (Index 15):
The method for fabricating a distributed feedback laser of  claim 9 , wherein the semiconductor-laminated structure includes:\n a semiconductor substrate; a lower cladding layer, located on the semiconductor substrate; a separated confinement hetero-structure (SCH) layer, located on the lower cladding layer; an active region layer, located on the lower SCH layer; an upper SCH layer, located on the active region layer; and, a spacer layer, located on the upper SCH layer; wherein the grating layer is located on the spacer layer; wherein the ridge structure, located on the grating layer, further includes an upper cladding layer on the grating layer and a contact layer on the upper cladding layer.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 2.22535
- Patent Class: 372.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14182335', '15145951', '13614280', '10636103', '12435562']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8295680663323332
- 35 USC 102 Novelty (BERT): 0.4986600376026903
- Combined Prediction Score: 0.7964772634593689
- Mean Citation Score: 240.690956
- Max Citation Score: 248.20692000000005
- Similarity Product: 193.594969778924

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

Dataset: test