# US 12,109,028 B2 · Method of making an electrode on a cover glass of a wearable electronic device

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- Number: US 12,109,028 B2
- Document ID: US12109028B2
- Status: Granted
- Kind: B2
- Application number: 18/010,348
- Filed: 2022-03-07
- Published: 2023-09-07
- Granted: 2024-10-08
- Earliest claimed: 2022-03-07
- Assignees: Google Inc.
- Applicants: Google LLC
- Inventors: Yehua Liao
- Web page: https://patentgrep.com/patent/US12109028B2

## CPC

- A61B 5/256: Wearable electrodes, e.g. having straps or bands
- A61B 5/681: {Wristwatch-type devices}
- A61B 2560/0468: Built-in electrodes
- A61B 2562/0209: Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
- A61B 2562/125: characterised by the manufacture of electrodes
- Y10T 29/49002: Electrical device making
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for forming an electrode is provided. The method includes removing portion(s) of a removable protective film to produce a removable protective film element having a first defined shape; positioning the removable protective film element on a first portion of a cover glass such that the first portion has the first defined shape; defining a second portion of the cover glass based at least in part on positioning the removable protective film element on the first portion, the second portion having a second defined shape; depositing a metal material on the second portion and/or the removable protective film element; removing portion(s) of the metal material to form electrode(s) on the second portion; and/or removing the removable protective film element from the first portion to produce the electrode(s) formed on the cover glass such that the cover glass and/or the electrode(s) have defined attribute(s).

## Claims

### Claim 1

A method to form an electrode on a cover glass of a wearable computing device, the method comprising:
providing the cover glass of the wearable computing device, wherein the cover glass includes a first portion and a second portion;
providing a removable protective film, wherein the removable protective film includes one or more portions;
forming a removable protective film element having a first defined shape and a second defined shape by removing the one or more portions of the removable protective film;
positioning the removable protective film element on the first portion of the cover glass of the wearable computing device such that the first portion of the cover glass is configured to match the first defined shape;
defining and forming the second portion of the cover glass of the wearable computing device while the removable protective film element is positioned on the first portion of the cover glass of the wearable computing device, the second portion formed of the cover glass configured to match the second defined shape of the removable protective film element;
depositing a metal material on the second portion of the cover glass;
removing one or more portions of the metal material to form the electrode on the second portion of the cover glass; and
removing the removable protective film element from the first portion of the cover glass to produce the electrode formed on the cover glass of the wearable computing device such that the electrode formed on the cover glass comprises one or more defined attributes.

### Claim 2 (depends on 1)

The method of claim 1, wherein the removable protective film element is a polyethylene terephthalate material layer.

### Claim 3 (depends on 2)

The method of claim 2, wherein the positioning the removable protective film element on the first portion of the cover glass comprises:
coupling the polyethylene terephthalate material layer to the first portion of the cover glass, the polyethylene terephthalate material layer being coupled to the first portion of the cover glass via an adhesive material layer disposed on a surface of the polyethylene terephthalate material layer.

### Claim 4 (depends on 2)

The method of claim 2, wherein the removing the removable protective film element from the first portion of the cover glass comprises:
removing the polyethylene terephthalate material layer from the first portion of the cover glass.

### Claim 5 (depends on 2)

The method of claim 2, wherein the removing the removable protective film element from the first portion of the cover glass comprises:
performing at least one of a peeling process, a polishing process, or a cleaning process to remove the polyethylene terephthalate material layer from the first portion of the cover glass.

### Claim 6 (depends on 1)

The method of claim 1, wherein the depositing the metal material on at least one of the second portion of the cover glass or the removable protective film element comprises:
performing a physical vapor deposition process to deposit the metal material on at least one of the second portion of the cover glass or the removable protective film element.

### Claim 7 (depends on 1)

The method of claim 1, wherein the removing the one or more portions of the metal material comprises:
performing at least one of a grinding process, an etching process, a polishing process, or a cleaning process to remove the one or more portions of the metal material.

### Claim 8 (depends on 1)

The method of claim 1, wherein the removing the removable protective film element from the first portion of the cover glass comprises:
performing at least one of a peeling process, a polishing process, or a cleaning process to remove the removable protective film element and a defined amount of the metal material disposed on the removable protective film element from the first portion of the cover glass.

### Claim 9 (depends on 1)

The method of claim 1, wherein the one or more defined attributes comprise at least one of a defined dimension, a defined profile, a defined geometry, a defined edge, a defined location, or a defined aesthetic feature of at least one of the cover glass or the electrode.

### Claim 10 (depends on 1)

The method of claim 1, wherein the wearable computing device comprises at least one of a smartwatch, a personal health monitoring device, a biometric tracking device, a biometric monitoring device, a heart monitor, or a fitness tracker.

### Claim 11 (depends on 1)

The method of claim 1, wherein the electrode formed on the cover glass of the wearable computing device comprises at least one of a sensor, a biometric sensor, a fingerprint sensor, a temperature sensor, a humidity sensor, a light sensor, a pressure sensor, an image sensor, a microphone, a photoplethysmogram sensor, or an electrodermal activity sensor.