Coated printed electronic devices exhibiting improved yield

Patent metadata

Field	Value
Publication number	US-10249625-B1
Application number	US-201816038427-A
Country	US
Kind code	B1
Filing date	Jul 18, 2018
Priority date	Jul 18, 2018
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A coated, printed electronic device may comprise a plurality of contact pads arranged in a pattern, a plurality of electrode traces arranged in another pattern, the plurality of electrode traces comprising a set of bottom electrode traces and a set of top electrode traces, each electrode trace in electrical communication with an associated contact pad of the plurality of contact pads, a plurality of memory cells, each memory cell located at an intersection of a pair of electrode traces of the plurality of electrode traces and comprising a bottom electrode layer formed from a region of one of the bottom electrode traces, a top electrode layer formed from a region of one of the top electrode traces, and a ferroelectric layer between the bottom and top electrode layers, and a protective layer covering the plurality of electrode traces and extending laterally beyond each edge of each electrode trace to provide a buffer zone surrounding each electrode trace, the buffer zone extending from an end of each electrode trace to cover a portion of each associated contact pad in an overlapping region, wherein each contact pad also has at least one uncovered edge.

First claim

What is claimed is:

1. A coated, printed electronic device comprising:
a plurality of contact pads arranged in a pattern,
a plurality of electrode traces arranged in another pattern, the plurality of electrode traces comprising a set of bottom electrode traces and a set of top electrode traces, each electrode trace in electrical communication with an associated contact pad of the plurality of contact pads,
a plurality of memory cells, each memory cell located at an intersection of a pair of electrode traces of the plurality of electrode traces and comprising a bottom electrode layer formed from a region of one of the bottom electrode traces, a top electrode layer formed from a region of one of the top electrode traces, and a ferroelectric layer between the bottom and top electrode layers, and
a protective layer covering the plurality of electrode traces and extending laterally beyond each edge of each electrode trace to provide a buffer zone surrounding each electrode trace, the buffer zone extending from an end of each electrode trace to cover a portion of each associated contact pad in an overlapping region, wherein each contact pad also has at least one uncovered edge, wherein the buffer zone is characterized by a buffer zone width which is no more than 2*√{square root over (2)}*(line registration capability) in the overlapping region.

2. The device of claim 1 , wherein the buffer zone width is greater than 200 μm and no more than 2*√{square root over (2)}*(line registration capability) in the overlapping region.

3. The device of claim 1 , wherein the buffer zone width is greater than zero and no more than 500 μm.

4. The device of claim 1 , wherein the buffer zone width is greater than 200 μm and no more than 500 μm.

5. The device of claim 1 , wherein the buffer zone width is at least 2*√{square root over (2)}*(line registration capability) in regions other than the overlapping region.

6. The device of claim 1 , wherein the protective layer is configured to define an aperture positioned over the plurality of contact pads.

7. The device of claim 6 , wherein the buffer zone width is greater than zero and no more than 500 μm, further wherein the protective layer is configured to define a gap between an edge of the protective layer and an adjacent facing edge of each contact pad, the gap characterized by a gap width which is at least 80 μm.

8. A plurality of coated, printed electronic devices comprising a substrate and a plurality of coated, printed electronic devices on the substrate, each device configured according to the device of claim 1 .

9. A coated, printed electronic device comprising:
a plurality of contact pads arranged in a pattern,
a plurality of electrode traces arranged in another pattern, the plurality of electrode traces comprising a set of bottom electrode traces and a set of top electrode traces, each electrode trace in electrical communication with an associated contact pad of the plurality of contact pads,
a plurality of memory cells, each memory cell located at an intersection of a pair of electrode traces of the plurality of electrode traces and comprising a bottom electrode layer formed from a region of one of the bottom electrode traces, a top electrode layer formed from a region of one of the top electrode traces, and a ferroelectric layer between the bottom and top electrode layers, and
a protective layer covering the plurality of electrode traces and extending laterally beyond each edge of each electrode trace to provide a buffer zone surrounding each electrode trace, the buffer zone extending from an end of each electrode trace to cover a portion of each associated contact pad in an overlapping region, wherein each contact pad also has at least one uncovered edge, wherein all edges of each contact pad are uncovered except for portions of edges in the overlapping region.

10. A coated, printed electronic device comprising:
a plurality of contact pads arranged in a pattern,
a plurality of electrode traces arranged in another pattern, the plurality of electrode traces comprising a set of bottom electrode traces and a set of top electrode traces, each electrode trace in electrical communication with an associated contact pad of the plurality of contact pads,
a plurality of memory cells, each memory cell located at an intersection of a pair of electrode traces of the plurality of electrode traces and comprising a bottom electrode layer formed from a region of one of the bottom electrode traces, a top electrode layer formed from a region of one of the top electrode traces, and a ferroelectric layer between the bottom and top electrode layers, and
a protective layer covering the plurality of electrode traces and extending laterally beyond each edge of each electrode trace to provide a buffer zone surrounding each electrode trace, the buffer zone extending from an end of each electrode trace to cover a portion of each associated contact pad in an overlapping region, wherein each contact pad also has at least one uncovered edge, wherein the protective layer is configured to define a gap between an edge of the protective layer and an adjacent facing edge of each contact pad, and wherein the gap is characterized by a gap width which is at least 2*(line registration capability).

11. The device of claim 10 , wherein the gap is characterized by a gap width which is at least 80 μm.

12. A coated, printed electronic device comprising:
a plurality of contact pads arranged in a pattern,
a plurality of electrode traces arranged in another pattern, the plurality of electrode traces comprising a set of bottom electrode traces and a set of top electrode traces, each electrode trace in electrical communication with an associated contact pad of the plurality of contact pads,
a plurality of memory cells, each memory cell located at an intersection of a pair of electrode traces of the plurality of electrode traces and comprising a bottom electrode layer formed from a region of one of the bottom electrode traces, a top electrode layer formed from a region of one of the top electrode traces, and a ferroelectric layer between the bottom and top electrode layers, and
a protective layer covering the plurality of electrode traces and extending laterally beyond each edge of each electrode trace to provide a buffer zone surrounding each electrode trace, the buffer zone extending from an end of each electrode trace to cover a portion of each associated contact pad in an overlapping region, wherein each contact pad also has at least one uncovered edge, wherein the plurality of contact pads is arranged in two arrays extending parallel to one another a defining a space therebetween, and further wherein the protective layer is configured to define two apertures, each aperture positioned over a respective one of the two arrays, and further wherein the plurality of electrode traces is arranged in a grid pattern positioned in the space.

13. The device of claim 12 , wherein the buffer zone width is greater than zero and no more than 500 μm, further wherein the protective layer is configured to define a gap between an edge of the protective layer and an adjacent facing edge of each contact pad, the gap characterized by a gap width which is at least 80 μm.

14. A coated, printed electronic device comprising:
a plurality of contact pads arranged in a pattern,
a plurality of electrode traces arranged in another pattern, the plurality of electrode traces comprising a set of bottom electrode traces and a set of top electrode traces, each electrode trace in electrical communication with an associated contact pad of the plurality of contact pads,
a plurali

Assignees

• Xerox Corp

Inventors

• Herko Jonathan H
• Roetker Michael S
• Tallman Kyle B
• Dudek Eric Robert
• Porter Amy Catherine
• Skinner David M
• Ma Lin
• Silvestri Markus R

Classifications

• H10P14/6346

  using printing, e.g. ink-jet printing · CPC title

• H10P14/46

  using a liquid · CPC title

• H10W72/9445

  Top-view layouts, e.g. mirror arrays · CPC title

• H10W20/4473 Primary

  Conductive organic materials, e.g. conductive adhesives or conductive inks · CPC title

• H10W20/43

  Layouts of interconnections · CPC title