摘要:
A method of manufacturing a semiconductor device is presented. In one aspect, the method comprises forming conductive and ferroelectric material layers on a semiconductor substrate. The material layers are patterned to form electrodes and a ferroelectric layer of a ferroelectric capacitor, wherein a conductive noble metal-containing polymer is generated on sidewalls of the ferroelectric capacitor. The method also comprises converting the conductive noble metal-containing polymer into a non-conducting metal oxide. Converting includes forming a water-soluble metal salt from the conductive noble metal-containing polymer and reacting the water-soluble metal salt with an acqueous acidic solution to form a metal hydroxide. Converting also includes oxidizing the metal hydroxide to form the non-conducting metal oxide.
摘要:
A method of manufacturing a semiconductor device. The method comprises forming conductive and ferroelectric material layers on a semiconductor substrate. The material layers are patterned to form electrodes and a ferroelectric layer of a ferroelectric capacitor, wherein a conductive residue is generated on sidewalls of the ferroelectric capacitor as a by-product of the patterning. The method also comprises removing the conductive residue using a physical plasma etch clean-up process that includes maintaining a substrate temperature that is greater than about 60° C.
摘要:
A method of manufacturing a semiconductor device is presented. In one aspect, the method comprises forming conductive and ferroelectric material layers on a semiconductor substrate. The material layers are patterned to form electrodes and a ferroelectric layer of a ferroelectric capacitor, wherein a conductive noble metal-containing polymer is generated on sidewalls of the ferroelectric capacitor. The method also comprises converting the conductive noble metal-containing polymer into a non-conducting metal oxide. Converting includes forming a water-soluble metal salt from the conductive noble metal-containing polymer and reacting the water-soluble metal salt with an acqueous acidic solution to form a metal hydroxide. Converting also includes oxidizing the metal hydroxide to form the non-conducting metal oxide.
摘要:
A method of manufacturing a semiconductor device. The method comprises forming conductive and ferroelectric material layers on a semiconductor substrate. The material layers are patterned to form electrodes and a ferroelectric layer of a ferroelectric capacitor, wherein a conductive residue is generated on sidewalls of the ferroelectric capacitor as a by-product of the patterning. The method also comprises removing the conductive residue using a physical plasma etch clean-up process that includes maintaining a substrate temperature that is greater than about 60° C.
摘要:
A method is provided for fabricating a ferroelectric capacitor structure including a method for etching and cleaning patterned ferroelectric capacitor structures in a semiconductor device. The method comprises etching portions of an upper electrode, etching ferroelectric material, and etching a lower electrode to define a patterned ferroelectric capacitor structure, and etching a portion of a lower electrode diffusion barrier structure. The method further comprises ashing the patterned ferroelectric capacitor structure using a first ashing process, where the ash comprises an oxygen/nitrogen/water-containing ash, performing a wet clean process after the first ashing process, and ashing the patterned ferroelectric capacitor structure using a second ashing process.
摘要:
A method is provided for fabricating a ferroelectric capacitor structure including a method for etching and cleaning patterned ferroelectric capacitor structures in a semiconductor device. The method comprises etching portions of an upper electrode, etching ferroelectric material, and etching a lower electrode to define a patterned ferroelectric capacitor structure, and etching a portion of a lower electrode diffusion barrier structure. The method further comprises ashing the patterned ferroelectric capacitor structure using a first ashing process, where the ash comprises an oxygen/nitrogen/water-containing ash, performing a wet clean process after the first ashing process, and ashing the patterned ferroelectric capacitor structure using a second ashing process.
摘要:
One aspect of the invention relates to a method of manufacturing an integrated circuit comprising forming an array of ferroelectric memory cells on a semiconductor substrate, heating the substrate to a temperature near a Curie temperature of the ferroelectric cores, and subjecting the substrate to a temperature program, whereby thermally induced stresses on the ferroelectric cores cause a switched polarization of the cores to increase by at least about 25% as the cores cool to about room temperature. Embodiments of the invention include metal filled vias of expanded cross-section above and below the ferroelectric cores, which increase the thermal stresses on the ferroelectric cores during cooling.
摘要:
Methods (100) are provided for fabricating a ferroelectric capacitor structure including methods (128) for etching and cleaning patterned ferroelectric capacitor structures in a semiconductor device. The methods comprise etching (140, 200) portions of an upper electrode, etching (141, 201) ferroelectric material, and etching (142, 202) a lower electrode to define a patterned ferroelectric capacitor structure, and etching (143, 206) a portion of a lower electrode diffusion barrier structure. The methods further comprise ashing (144, 203) the patterned ferroelectric capacitor structure using a first ashing process, performing (145, 204) a wet clean process after the first ashing process, and ashing (146, 205) the patterned ferroelectric capacitor structure using a second ashing process directly after the wet clean process at a high temperature in an oxidizing ambient.
摘要:
A planar integrated MEMS device has a piezoelectric element on a dielectric isolation layer over a flexible element attached to a proof mass. The piezoelectric element contains a ferroelectric element with a perovskite structure formed over an isolation dielectric. At least two electrodes are formed on the ferroelectric element. An upper hydrogen barrier is formed over the piezoelectric element. Front side singulation trenches are formed at a periphery of the MEMS device extending into the semiconductor substrate. A DRIE process removes material from the bottom side of the substrate to form the flexible element, removes material from the substrate under the front side singulation trenches, and forms the proof mass from substrate material. The piezoelectric element overlaps the flexible element.
摘要:
An integrated circuit containing a FeCap array. The FeCap array is at least partially surrounded on the sides by hydrogen barrier walls and on the top by a hydrogen barrier top plate. A method for at least partially enclosing a FeCap array with hydrogen barrier walls and a hydrogen barrier top plate.