PATENT CLAIM ANALYSIS

Application Number: 16102537
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-09
Patent Classification: ["438", "023000"]

Abstract:
A stack of strata containing LEDs is fabricated by repeatedly bonding unpatterned epitaxial structures. Because the epitaxial structures are unpatterned (e.g., not patterned into individual micro LEDs), requirements on alignment are significantly relaxed. One example is an integrated multi-color LED display panel, in which arrays of micro LEDs are integrated with corresponding driver circuitry. Multiple strata of micro LEDs are stacked on top of a base substrate that includes the driver circuitry. In this process, each stratum is fabricated as follows. An unpatterned epitaxial structure is bonded on top of the existing device. The epitaxial structure is then patterned to form micro LEDs. The stratum is filled and planarized to allow the unpatterned epitaxial structure of the next stratum to be bonded. This is repeated to build up the stack of strata.

Claim (Index 20):
A method for fabricating a micro-LED display chip, comprising:\n providing a substrate supporting an array of pixel drivers; and fabricating three strata stacked on top of the substrate and pixel drivers, with a planar interface between adjacent strata, one of the strata containing red micro LEDs, another one of the strata containing green micro LEDs, and a third one of the strata containing blue micro LEDs, wherein fabricating each stratum comprises:\n for a bottom stratum: bonding, using metal layers, an unpatterned epitaxial structure on top of the substrate and pixel drivers; and for any other stratum: bonding, using metal layers, an unpatterned epitaxial structure on top of a previous stratum; \n patterning the epitaxial structure to form the micro LEDs for the stratum, and patterning the bonding metal layers to form metal pads, some of the metal pads functioning as lower contact metal pads electrically connected to bottoms of the micro LEDs; \n depositing upper contact metal pads electrically connected to tops of the micro LEDs; \n for all strata except a top stratum, filling and planarizing the stratum to create a planar top interface, the top interface including electrical connections to tops of the micro LEDs; and \n fabricating vias from the planar top interface to the upper contact metal pads and to the metal pads that do not function as lower contact metal pads.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 96.0
- Lexical Diversity: 1.81481
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['16076315', '15836703', '15269954', '15135217', '15209309']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8438687382727301
- 35 USC 102 Novelty (BERT): 0.5265988712125785
- Combined Prediction Score: 0.8121417515667151
- Mean Citation Score: 234.406878
- Max Citation Score: 352.69278
- Similarity Product: 308.879428118012

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

Dataset: test