Abstract:
본 발명은 공정비용이 낮으면서도 저온에서 수행되어 실리콘 박막의 품질을 유지할 수 있는 결정질 실리콘 기판의 박리방법에 관한 것으로서, 결정질 실리콘 기판을 준비하는 단계; 전해 증착(electrodeposition)을 위한 도금욕(bath)을 구성하는 단계; 상기 도금욕을 이용하여 전해 증착공정으로 상기 결정질 실리콘 기판에 스트레스층을 형성하는 단계; 및 상기 스트레스층에 잔류하는 전해 증착 응력에 의하여 상기 결정질 실리콘 기판의 표면을 박리하는 단계를 포함한다. 본 발명의 다른 형태에 의한 결정질 실리콘 기판의 표면 박리방법은, 결정질 실리콘 기판을 준비하는 단계; 상기 결정질 실리콘 기판에 버퍼층을 형성하는 단계; 전해 증착을 위한 도금욕을 구성하는 단계; 상기 도금욕을 이용하여 전해 증착공정으로 상기 버퍼층의 표면에 스트레스층을 형성하는 단계; 및 상기 스트레스층에 잔류하는 전해 증착 응력에 의하여 상기 결정질 실리콘 기판의 표면을 박리하는 단계를 포함하며, 상기 버퍼층에 잔류하는 응력이 상기 스트레스층에 잔류하는 응력보다 작은 것을 특징으로 한다. 본 발명은, 전해 증착을 이용하여 결정질 실리콘 기판을 박리함으로써, 저비용으로 결정질 실리콘 박막을 제조할 수 있으며, 고온에서 실리콘 박막의 품질이 저하되는 단점을 방지할 수 있는 효과가 있다.
Abstract:
In a processing system for electroplating semiconductor wafers and similar substrates, the contact ring of the electroplating processor is removed from the rotor of the processor and replaced with a previously deplated contact ring. This allows the contact ring to be deplated in ring service module of the system, while the processor continues to operate. Wafer throughput is improved. The contact ring may be attached to a chuck for moving the contact ring between the processors and the ring service module, with the chuck quickly attachable and releasable to the rotor.
Abstract:
A substrate processor uses pressurized gas to create a vortex for lifting and holding a wafer, and to create a vacuum to prevent the wafer from adhering to a contact ring seal after electroplating the wafer. A processor head has a rotor movable into and out of an electrolyte vessel. A backing plate on the rotor includes vortex outlets which create the vortex in the rotor. A vacuum channel adjacent to the perimeter of the rotor applies vacuum to the wafer edges to hold the wafer onto the backing plate. A solenoid or switch in the head has a first position to supply gas flow to the vortex outlets, and a second position to supply gas flow to an aspirator which creates the vacuum in the vacuum channel.
Abstract:
A method for electroplating a wafer detects plating bath failure based on a voltage change. The method is useful in plating wafers having TSV features. Voltage of each anode of a plating processor may be monitored. An abrupt drop in voltage signals a bath failure resulting from conversion of an accelerator such as SPS to it's by products MPS. Bath failure is delayed or avoided by current pulsing or current ramping. An improved plating bath has a catholyte with a very low acid concentration.
Abstract:
The invention relates to an ink composition suitable for applications onto solar cells. Specifically, the invention describes several compositions, using nickel/silicon alloys which have been found to be particularly effective contact metallisation of emitter layers. The ratio of nickel to silicon in claimed invention is in the range of 0.1:1 to 1:0.1.
Abstract:
A method for providing copper filled features in a layer is provided. A deposition of copper is provided to fill features in the layer. Tops of the copper deposit are cleaned to remove copper or copper oxide at tops of the copper deposit. A selective copper alloy plating on the tops of the copper deposit is provided. The copper deposit and selective copper alloy plating are annealed.