摘要:
Within a method for forming a spacer layer from a second layer formed of a second material laminated upon a first layer formed of a first material, in turn formed over a topographic feature, there is employed a three step etch method. The three step etch method employs: (1) a first etch method having a first enhanced etch selectivity for the second material with respect to the first material; (2) a second etch method having a second substantially neutral etch selectivity for the second material with respect to the first material; and (3) a third etch method having a third enhanced etch selectivity for the first material with respect to the second material. In accord with the three step etch method, the spacer layer is fabricated with enhanced dimensional control.
摘要:
A method for shrinking equivalent critical dimension of mask by in situ polymer deposition and etching is proposed. The invention comprises following key points: First, when a photo-resist is formed on a substrate by a mask and a photolithography process, a polymer layer is formed on said photo-resist. Second, a plasma reactor with at least two independent power sources is used to form and etch the polymer layer, where ion density and ion energy of plasma are adjusted respectively by different power sources. Third, voltages of all power sources are adjusted such that etching rate and depositing rate are equivalent on surface of the photo-resist and etching rate is obviously larger than depositing rate in bottom of any structure of the photo-resist. Therefore, the sidewall of any structure is filled by a conformal polymer layer and then width of any structure is efficiently decreased. By the way, the critical dimension of any structure is significant smaller than critical dimension of the mask. In other words, equivalent critical dimension of mask is shrunk by the invention. Obviously, the photo-resist with shrunk critical dimension can be used to form semiconductor device with critical dimension that is more narrow than critical dimension of the mask.
摘要:
The present invention discloses an electrode structure of a light emitted diode and manufacturing method of the electrodes. After formed a pn junction of a light emitted diode on a substrate, a layer of SiO2 is deposited on the periphery of the die of the LED near the scribe line of the wafer, then a transparent conductive layer is deposited blanketly, then a layer of gold or AuGe etc. is formed with an opening on the center of the die. After forming alloy with the semiconductor by heat treatment to form ohmic contact, a strip of aluminum (Al) is formed on one side of the die on the front side for wire bonding and to be the positive electrode of the LED. The negative electrode is formed on the substrate by metal contact. Another form of the electrode structure of the present invention is making both the positive and negative electrodes on the front side of the LED by etching the p-type semiconductor of the pn junction and forming a strip of negative electrode on the n-type semiconductor, the positive electrode is formed on the p-type semiconductor.
摘要:
A new method for fabricating a borderless interconnection in a semiconductor device is provided. During fabrication, the device includes an interlevel dielectric (ILD) layer, a metal silicide layer, and a stop layer disposed between the ILD and metal silicide layers. The stop layer may be formed of silicon nitride or silicon oxynitride, and the metal silicide layer may be a nickel silicide. The method includes etching the ILD layer to expose at least a portion of the stop layer and then performing a nitrogen plasma treatment on the exposed portion of the stop layer. After the treatment, the exposed portion of the stop layer is removed to provide the interconnection hole. Because of the plasma treatment, damage to the metal silicide underlying the stop layer will be minimized when the stop layer is removed.
摘要:
A method for semiconductor device feature development using a bi-layer photoresist including providing a non-silicon containing photoresist layer over a substrate; providing a silicon containing photoresist over the non-silicon containing photoresist layer; exposing said silicon containing photoresist layer to an activating light source an exposure surface defined by an overlying pattern according to a photolithographic process; developing said silicon containing photoresist layer according to a photolithographic process to reveal a portion the non-silicon containing photoresist layer; and, dry developing said non-silicon containing photoresist layer in a plasma reactor by igniting a plasma from an ambient mixture including at least oxygen, carbon monoxide, and argon.
摘要:
A method of forming a stacked capacitor having improved capacitance in a dynamic random access memory device is provided wherein and additional pad polysilicon layer is deposited prior to the forming of the capacitor cell contact area such that the side-wall of the capacitor cell can be increased. The increased side-wall thickness of the capacitor cell leads to an improved capacitance value for the cell. The present invention also provides a stacked capacitor formed in a semiconductor device that contains an additional pad polysilicon layer for increasing the thickness of the capacitor side-wall and subsequently its capacitance.
摘要:
A method for eliminating the etching microloading effect is proposed for the invention. Spirit of the invention is that a coating layer is formed on a photo-resist that covers a substrate before the substrate is etched, where coating layer maybe a polymer layer or a dielectric layer. Because step coverage of the coating layer is limited by the aspect of trench, for photo-resist it means the width of openings, it is indisputable that depth of coating layer on bottom of a narrow opening is smaller than depth of coating layer on bottom of a wide opening. Therefore, during following etching process, although etching microloading effect induces etching rate is higher in the wide opening and is lower in the narrow opening, but the thicker coating layer on bottom of the wide opening also requires larger etching time than the narrow opening. Consequently, it is crystal-clear that the etching microloading effect is cancelled and then depth of the wide trench is equal to depth of the narrow trench.