Semiconductor device
US-2024128187-A1 · Apr 18, 2024 · US
ESD protection circuit
US8963288B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8963288-B2 |
| Application number | US-201313740805-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 14, 2013 |
| Priority date | Jan 14, 2013 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
An electrostatic discharge (ESD) protection circuit is coupled between first and second pads to protect an internal circuit therebetween. Under a normal operating condition, a voltage on the first pad is higher than that on the second pad. The ESD protection circuit includes a substrate of a first conductivity type; first well of a second conductivity type in the substrate, wherein the first well is coupled to the first pad; a snapback device housed in the first well; and a diode string in the substrate, connected in series with the snapback device and separated from the first well, wherein the serially connected diode string and snapback device is connected between the first pad and the second pad. With the isolation from the first well, the holding voltage of the ESD protection circuit can be tuned by adjusting the number of diodes in the diode string without using a guard ring.
First claim
Opening claim text (preview).
What is claimed is: 1. An electrostatic discharge (ESD) protection circuit coupled between a first pad and a second pad, a voltage on the first pad being higher than a voltage on the second pad under operation, wherein the ESD protection circuit comprises: a substrate of a first conductivity type; a first well of a second conductivity type in the substrate, wherein the first well is coupled to the first pad; a snapback device housed in the first well; and a diode string in t…
Assignees
Inventors
Classifications
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8963288B2 cover?
- An electrostatic discharge (ESD) protection circuit is coupled between first and second pads to protect an internal circuit therebetween. Under a normal operating condition, a voltage on the first pad is higher than that on the second pad. The ESD protection circuit includes a substrate of a first conductivity type; first well of a second conductivity type in the substrate, wherein the first we…
- Who is the assignee on this patent?
- Macronix Int Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H10D89/60. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).