Patent ID: 7879410
Filing Date: 2011-02-01
Classification: C23C,H01M,Y02E,Y02P

Abstract:
1. A method of fabricating a multi-layered thin film electrochemical device, comprising: providing a first target material in a chamber; providing an electrically conductive substrate in the chamber; emitting a first intermittent laser beam directed at the first target material to generate a first plasma, wherein each pulse of the first intermittent laser beam has a pulse duration of about 20 fs to about 1000 fs; depositing the first plasma on or above the substrate to form a first thin film electrode; providing a second target material in the chamber; emitting a second intermittent laser beam directed at the second target material to generate a second plasma, wherein each pulse of the second intermittent laser beam has a pulse duration of about 20 fs to about 1000 fs; and depositing the second plasma on or above the first thin film to form a second thin film electrode; wherein the first and second plasmas are substantially free of molten droplets and/or particulates having a size of about 1 μm or greater, wherein the first and second plasmas are deposited under conditions such that each of the first and second thin films has an average surface roughness of less than about 500 nm RMS, wherein the second thin film is a cathode thin film and the first thin film is an anode thin film, or the second thin film is an anode thin film and the first thin film is a cathode thin film; and wherein a solid electrolyte is formed between the first and second thin films, and wherein each of the first target material and second target material is a metal or metal oxide and the target material for forming the anode thin film is of a material which results in the anode thin film being capable of reversibly undergoing intercalation/de-intercalation and/or alloying/de-alloying with lithium ions.