Abstract:
A method for patterning a material during fabrication of a semiconductor device provides for the selective formation of either asymmetrical features or symmetrical features using a symmetrical photomask, depending on which process flow is chosen. The resulting features which are fabricated use spacers formed around a patterned material. If one particular etch is used to remove a base material, symmetrical features result. If two particular etches are used to remove the base material, asymmetrical features remain.
Abstract:
A method and system for etching a hafnium containing material using a boron tri-chloride (BCI 3 ) based process chemistry is described. A substrate having a hafnium containing layer, such as a layer of hafnium dioxide (HfO 2 ) is subjected a dry etching process comprising BCI 3 and an additive gas including: an oxygen-containing gas, such as O 2 ; or a nitrogen-containing gas, such as N 2 ; or a hydrocarbon gas (C x H y ), such as CH 4 ; or a combination of two or more thereof.
Abstract translation:描述了使用基于三氯化硼(BCI 3/3)的工艺化学蚀刻含铪材料的方法和系统。 具有含铪层,例如二氧化铪层(HfO 2 SUB)层的衬底经受包含BCI 3和包含氧的添加气体的干法刻蚀工艺 含气体,如O 2 SUB>; 或含氮气体,例如N 2 SUB; 或碳氢化合物气体(CH H Y SUB>),例如CH 4 SUB>; 或其两种或更多种的组合。
Abstract:
Disclosed is a method for processing a two layer mask for use in fabrication of semiconductor devices whereby the critical dimension (CD) of a semiconductor device being fabricated with the mask can be controlled. After forming a carbon mask layer, preferably by a spin-on process, and a silicon containing photoresist layer on the carbon mask, a two-step process forms openings in the carbon mask layer, as required for subsequent device fabrication. The structure is placed in a plasma processing chamber, and an oxygen plasma is employed to partially etch the carbon layer. The oxygen plasma reacts with silicon in the photoresist to form a hard silicon oxide layer on the surface of the photoresist. A hydrogen plasma is then employed to complete the etch through the carbon layer with a reduced critical dimension.
Abstract:
A method for selectively etching a high k layer with respect to a silicon based material is provided. The high k layer is placed into an etch chamber. An etchant gas is provided into the etch chamber, wherein the etchant gas comprises H 2 . A plasma is generated from the etchant gas to selectively etch the high k layer with respect to a silicon based material.
Abstract:
A method for selectively etching a high k layer with respect to a silicon based material is provided. The high k layer is placed into an etch chamber. An etchant gas is provided into the etch chamber, wherein the etchant gas comprises H 2 . A plasma is generated from the etchant gas to selectively etch the high k layer with respect to a silicon based material.
Abstract:
A method of plasma etching comprises using a primary etchant of carbon monoxide gas to etch a transition metal or transition metal compound and to form a volatile by-product of metal carbonyl.
Abstract:
Ferrocapacitors having a vertical structure are formed by a process in which a ferroelectric layer (33) is deposited over an insulator (31). In a first etching stage, the ferroelectric material is etched to form openings (35) in it, leaving the insulating layer substantially intact. Then a conductive layer (39) is deposited into the openings formed in the ferroelectric layer, forming electrodes on the sides of the openings. Further etching is performed to form gaps in the AI 2 O 3 layer (31), for making connections to conductive elements (3) beneath it. Thus, by the time the second etching step is performed, there are already electrodes overlying the sides of the ferroelectric material, without insulating fences in between.
Abstract translation:具有垂直结构的铁电体通过在绝缘体(31)上沉积铁电层(33)的工艺形成。 在第一蚀刻阶段,蚀刻铁电材料以在其中形成开口(35),使绝缘层基本上保持完整。 然后,将导电层(39)沉积到形成在铁电层中的开口中,在开口的侧面形成电极。 执行进一步蚀刻以在Al 2 O 3层(31)中形成间隙,以便连接到其下的导电元件(3)。 因此,在执行第二蚀刻步骤之前,已经有电极覆盖在铁电材料的侧面,而两者之间没有绝缘栅栏。