PATENT CLAIM ANALYSIS

Application Number: 15955953
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["438", "464000"]

Abstract:
A device chip manufacturing method includes a passivation film removing step of removing a passivation film along each division line, a wafer dividing step of performing plasma etching using a fluorine-based gas to the front side of a wafer in the condition where the passivation film is used as a mask, thereby dividing the wafer along the division lines, and a die attach film removing step of performing plasma etching using an oxygen-based gas to the front side of the wafer in the condition where the passivation film is used as a mask, thereby removing a part or the whole of a die attach film along each division line.

Claim (Index 1):
A device chip manufacturing method for processing a wafer to manufacture a plurality of device chips from said wafer, said wafer having a plurality of devices formed on the front side so as to be separated by a plurality of crossing division lines, a passivation film being formed on the front side of said wafer so as to cover said plurality of devices, said device chip manufacturing method comprising:\n a passivation film removing step of removing said passivation film along each division line; a wafer supporting step of attaching a die attach film to the back side of said wafer and next attaching a dicing tape mounted on an annular frame to said die attach film to thereby support said wafer through said die attach film to said dicing tape; a wafer dividing step of performing plasma etching using a fluorine-based gas to the front side of said wafer in the condition where said passivation film is used as a mask after performing said passivation film removing step and said wafer supporting step, thereby dividing said wafer into said individual device chips along said division lines and exposing said die attach film along said division lines; and a die attach film removing step of performing plasma etching using an oxygen-based gas to the front side of said wafer in the condition where said passivation film is used as a mask after performing said wafer dividing step, thereby removing a part or the whole of said die attach film along each division line.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 91.0
- Lexical Diversity: 2.42553
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15790252', '15679407', '14817366', '14736872', '15456800']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.862665088730417
- 35 USC 102 Novelty (BERT): 0.4852903162079275
- Combined Prediction Score: 0.8249276114781682
- Mean Citation Score: 229.97037800000004
- Max Citation Score: 240.58875
- Similarity Product: 199.43892378017304

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