Printed electronic devices exhibiting improved yield
A 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, and 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. The plurality of contact pads comprises at least one unmodified contact pad having a surface area, shape and size, the plurality of contact pads further comprising at least one modified contact pad having a reduced surface area, and a different size, a different shape, or both, as compared to the at least one unmodified contact pad.
1. A 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, and
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,
wherein the plurality of contact pads comprises at least one unmodified contact pad having a surface area, shape and size, the plurality of contact pads further comprising at least one modified contact pad having a reduced surface area, and a different size, a different shape, or both, as compared to the at least one unmodified contact pad, wherein the at least one modified contact pad has an irregular pentagonal shape or an irregular hexagonal shape.
2. A 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, and
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,
wherein the plurality of contact pads comprises at least one unmodified contact pad having a surface area, shape and size, the plurality of contact pads further comprising at least one modified contact pad having a reduced surface area, and a different size, a different shape, or both, as compared to the at least one unmodified contact pad, wherein the plurality of contact pads comprises multiple modified contact pads comprising at least one irregular pentagonal shaped contact pad and at least one irregular hexagonal shaped contact pad.
3. A 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, and
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,
wherein the plurality of contact pads comprises at least one unmodified contact pad having a surface area, shape and size, the plurality of contact pads further comprising at least one modified contact pad having a reduced surface area, and a different size, a different shape, or both, as compared to the at least one unmodified contact pad, wherein the plurality of contact pads is arranged in two linear arrays extending parallel to one another and defining a gap therebetween and wherein the plurality of electrode traces is arranged in a grid pattern positioned in the gap.
4. A 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, and
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,
wherein the plurality of contact pads comprises at least one unmodified contact pad having a surface area, shape and size, the plurality of contact pads further comprising at least one modified contact pad having a reduced surface area, and a different size, a different shape, or both, as compared to the at least one unmodified contact pad, wherein the at least one modified contact pad has an edge configured such that a clearance between the edge and a closest neighboring electrode trace is at least 2*√{square root over (2)}*(line registration capability).
5. The device of claim 3 , wherein the at least one modified contact pad has an edge configured such that a clearance between the edge and a closest neighboring electrode trace is at least 500 μm.
6. A 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, and
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,
wherein the plurality of contact pads comprises at least one unmodified contact pad having a surface area, shape and size, the plurality of contact pads further comprising at least one modified contact pad having a reduced surface area, and a different size, a different shape, or both, as compared to the at least one unmodified contact pad, wherein an end of each electrode trace of the plurality of electrode traces extends linearly to the associated contact pad and wherein the at least one modified contact pad has an edge which is linear and oriented parallel to a closest neighboring electrode trace.
7. The device of claim 6 , wherein the at least one modified contact pad has a non-rectangular polygonal shape.
8. The device of claim 7 , wherein the at least one modified contact pad has an irregular, non-rectangular polygonal shape.
9. The device of claim 3 , wherein the at least one unmodified contact pad has a rectangular shape.
10. The device of claim 3 , wherein an end of each electrode trace of the plurality of electrode traces extends linearly to the associated contact pad and wherein the at least one modified contact pad has an edge which is linear and oriented parallel to a closest neighboring electrode trace.
11. The device of claim 10 , wherein the at least one modified contact pad has a non-rectangular polygonal shape and the at least one unmodified contact pad has a rectangular shape.
12. The device of claim 11 , wherein the at least one modified contact pad has an irregular, pentagonal shape.
13. A plurality of electronic devices comprising a substrate and a plurality of electronic devices on the substrate, each device configured according to the device of claim 3 .
14. A method of fabricating the device of claim 3 , the method comprising:
printing a plurality of bottom electrode traces on a substrate;
printing the layer of the ferroelectric material on the plurality of bottom electrode traces;
printing a plurality of top electrode traces on the layer of the ferroelectric material, wherein the plurality of bottom and top electrode traces forms the plurality of electrode traces arranged in the another pattern and defines the plurality of memory cells, each memory cell located at the intersection of the pair of electrode traces of the plurality of electrode traces; and
printing the plurality of contact pads on the plurality of electrode traces, wherein the plurality of contact pads is arranged in the pattern and each electrode trace of the plurality of electrode traces is in electrical communication with the associated contact pad of the plurality of contact pads,
wherein the plurality of contact pads comprises the at least one unmodified contact pad having the surface area, shape and size, the plurality of contact pads further comprising the least one modified contact pad having the reduced surface area, and the different size, the different shape, or both, as compared to the at least one unmodified contact pad, and wherein the plurality of contact pads is arranged in the two linear arrays extending parallel to one another and defining the gap therebetween and wherein the plurality of electrode traces is arranged in the grid pattern positioned in the gap.
15. A method of using the device of claim 3 , the method comprising contacting the plurality of contact pads of the device of claim 3 with a plurality of pins of a read/write unit.