摘要:
A method for implementing discrete superpositioning of two or more defocal wafer images at different defocal positions in a lithographic step and scan projection system. The method includes tilting one of a mask and a wafer with respect to a scanning direction and splitting an illumination beam into at least two illumination areas which are in different defocus zones of the mask.
摘要:
A method of forming an opening on a low-k dielectric layer using a polysilicon hard mask rather than a metal hard mask as used in prior art. A polysilicon hard mask is formed over a low-k dielectric layer and a photoresist layer is formed over the polysilicon hard mask. The photoresist layer is patterned and the polysilicon hard mask is etched with a gas plasma to create exposed portions of the low-k dielectric layer. The photoresist layer in stripped prior to the etching of the exposed portions of the low-k dielectric layer to avoid damage to the low-k dielectric layer.
摘要:
The present invention provides a method for improving cell-attachment efficiency comprising (a) preparing a protein in aqueous solution, wherein the protein has a formula A-B-C, wherein A represents a GRGDS amino acid sequence; B represents a cellulose binding domain (CBD); and C represents a GRGDS amino acid sequence, an RGD amino acid sequence, or an amino acid sequence of growth factor; (b) coating the protein solution into a carrier; and (c) seeding cells onto the carrier.
摘要:
A system and method for allowing a person to place a call to another person under the SIP framework when viewing a display portion on a webpage with only one click of a mouse or one press of a keyboard key and using a stand-alone communication program is provided. The above system includes a client end, a server, a service end, an application program obtained from a server, a user-executable portion accessible at the client end on a webpage, a digital certificate authenticated against a digital signature, an active communication channel established between the client end and the service end, a ready message displayed on the webpage, an active communication session established at the client end and the service end, a session key for session registration, and one or more voice communication devices.
摘要:
A Cu damascene structure is formed where Cu diffusion barrier is formed by treating the top surface of the surrounding low-k interlayer dielectric with nitrogen or carbon containing medium to form a silicon nitride or silicon carbide diffusion barrier rather than capping the top surface of the Cu with metal diffusion barrier as is conventionally done.
摘要:
A method for fabricating a high-density array of crown capacitors with increased capacitance while reducing process damage to the bottom electrodes is achieved. The process is particularly useful for crown capacitors for future DRAM circuits with minimum feature sizes of 0.18 micrometer or less. A conformal conducting layer is deposited over trenches in an interlevel dielectric (ILD) layer, and is polished back to form capacitor bottom electrodes. A novel photoresist mask and etching are then used to pattern the ILD layer to provide a protective interlevel dielectric structure between capacitors. The protective structures prevent damage to the bottom electrodes during subsequent processing. The etching also exposes portions of the outer surface of bottom electrodes for increased capacitance (>50%). In a first embodiment the ILD structure is formed between pairs of adjacent bottom electrodes, and in a second embodiment the ILD structure is formed between four adjacent bottom electrodes.
摘要:
Apparatus for forming a semiconductor structure comprising a first layer on top of a substrate wherein the first layer defines conductive regions such as copper interconnect lines and non-conductive regions such as dielectric materials. The conductive regions are covered by a second layer of a material different than the first layer such as for example nickel and then the structure is heat treated such that the interconnect lines and second metal, such as a copper interconnect line and a nickel second layer, interact with each other to form an alloy layer. The alloy layer has superior qualities for adhering to both the copper interconnect lines and a subsequently deposited dielectric material.
摘要:
Methods and apparatus for forming a semiconductor structure comprising a first layer on top of a substrate wherein the first layer defines conductive regions such as copper interconnect lines and non-conductive regions such as dielectric materials. The conductive regions are covered by a second layer of a material different than the first layer such as for example nickel and then the structure is heat treated such that the interconnect lines and second metal, such as a copper interconnect line and a nickel second layer, interact with each other to form an alloy layer. The alloy layer has superior qualities for adhering to both the copper interconnect lines and a subsequently deposited dielectric material.
摘要:
A Cu damascene structure is formed where Cu diffusion barrier is formed by treating the top surface of the surrounding low-k interlayer dielectric with nitrogen or carbon containing medium to form a silicon nitride or silicon carbide diffusion barrier rather than capping the top surface of the Cu with metal diffusion barrier as is conventionally done.
摘要:
This invention describes an attenuating phase shifting mask, a method of forming the attenuating phase shifting mask, and a method of using the attenuating phase shifting mask to expose a contact hole pattern having both dense and isolated contact holes on a layer of photosensitive dielectric. The mask has a rim of first attenuating phase shifting material, having a first transmittance and providing a phase shift of 180°, surrounding the dense holes and a rim of second attenuating phase shifting material, having a second transmittance and providing a phase shift of 180°, surrounding the isolated holes. The second transmittance is greater than the first transmittance. The dense holes have a duty ratio of less than 2.0 and the isolated holes have a duty ratio of greater than or equal to 2.0. The second attenuating phase shifting material results from treating the first attenuating phase shifting material for a first time with a first solution which increases the transmittance and changes the phase shift. The attenuating phase shifting material is then treated with a second solution for a second time to restore the phase shift to 180° and further increase the transmittance.