Self-aligned printing
AssigneesPlastic Logic Limited, Cambridge University Technical Services Limited
InventorsHenning Sirringhaus, Michael J. Banach, Nicholas Jim Stone, David William Joseph Wilson, John Devin Mackenzie, Wilhelmus Theodorus Stefanus Huck, Christoph Wilhelm Sele
Life of this patent
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Abstract
A method for forming an organic or partly organic switching device. The method comprises depositing layers of conducing, semiconducting and/or insulating layers by solution processing and direct printing. Then, high-resolution patterns of electroactive polymers are formed by self-aligned formation of a surface energy barrier around a first pattern that repels the solution of a second material.
Claims103
A method of forming an electronic device, comprising:
- forming a first body having a first composition on a first region of a substrate;
- subsequently depositing a liquid of a second composition in contact with the first body to form a second body not in contact with the first body on a second region of the substrate adjacent the first region;
- and
- preparing the surface of the first body prior to the deposition of the liquid of the second composition to repel the liquid of the second composition,
- wherein the shortest distance between the first and second bodies defines a dimension of a critical feature of the electronic device, and wherein the first body forms an active feature of the electronic device.
A method of forming an electronic device, comprising:
- forming a first body on a first region of the substrate;
- and
- subsequently depositing a liquid of a second composition in contact with the first body to form a second body in contact with the first body on a second region of the substrate adjacent the first region,
- wherein the first body has a non-conducting or semiconducting surface region whose thickness defines a dimension of a critical feature of the electronic device, and a conductive region underlying the non-conducting or semiconducting surface region.
An electronic switching device comprising a source electrode, a drain electrode, a gate electrode, a semiconductor region electrically between the source electrode and the drain electrode and a dielectric region electrically between the semiconductor region and the gate electrode, the semiconductor region being in the form of a layer of substantially uniform thickness located over at least one of the source electrode and the drain electrode and being located physically between and adjacent to the source electrode and the drain electrode so as to separate the source electrode and the drain electrode such that at their closest proximity the source electrode and the drain electrode are spaced apart by the thickness of the said layer.
An electronic switching device comprising a source electrode, a drain electrode, a gate electrode, a semiconductor region electrically between the source electrode and the drain electrode and a dielectric region electrically between the semiconductor region and the gate electrode, the dielectric region being in the form of a layer of substantially uniform thickness and being:
- located physically between and adjacent to the gate electrode and at least one of the source electrode and the drain electrode, so as to separate the gate electrode and the said one of the source electrode and the drain electrode such that at their closest proximity the gate electrode and the said one of the source electrode and the drain electrode are spaced apart by the thickness of the said layer;
- and
- located physically between and adjacent to the source electrode and the drain electrode, so as to separate the source electrode and the drain electrode such that at their closest proximity the source electrode and the drain electrode are spaced apart by the thickness of the said layer.
Dependencies are inferred from the claim text.