公开(公告)号：SG80082A1

公开(公告)日：2001-04-17

申请号：SG1999005207

申请日：1999-10-21

Applicant: IBM

Inventor： TOSHIHARU FURUKAWA ,  MARK C HAKEY ,  STEVEN J HOLMES ,  DAVID V HORAK ,  PAUL A RABIDOUX

IPC: G03F7/00 ,  G03F7/20 ,  H01L21/027 ,  H01L21/033 ,  H01L21/28 ,  H01L21/311 ,  H01L21/768 ,  G03C5/58

Abstract: The present invention overcomes the limitations of the prior art to allow for the creation of smaller components for use in logic circuits. The invention provides a new method of defining and forming features on a semiconductor substrate by using a layer of material, referred to as a shadow mandrel layer, to cast a shadow. A trough is etched in the shadow mandrel layer. At least one side of the trough will be used to cast a shadow in the bottom of the trough. A conformally deposited photoresist is used to capture the image of the shadow. The image of the shadow is used to define and form a feature. This allows for the creation of images on the surface of a wafer without the diffraction effects encountered in conventional photolithography. This allows for a reduced device size and increased chip operating speed.

公开(公告)号：SG82025A1

公开(公告)日：2001-07-24

申请号：SG1999005186

申请日：1999-10-18

Applicant: IBM

Inventor： TOSHIHARU FURUKAWA ,  MARK C HAKEY ,  STEVEN J HOLMES ,  DAVID V HORAK ,  PAUL A RABIDOUX

IPC: H01L21/033 ,  H01L21/308 ,  H01L21/336 ,  H01L21/768 ,  H01L21/822 ,  H01L29/78

Abstract: The present invention provides a method for forming self-aligned spacers on the horizontal surfaces while removing spacer material from the vertical surfaces. The preferred method uses a resist that can be made insoluble to developer by the use of an implant. By conformally depositing the resist over a substrate having both vertical and horizontal surfaces, implanting the resist, and developing the resist, the resist is removed from the vertical surfaces while remaining on the horizontal surfaces. Thus, a self-aligned spacer is formed on the horizontal surfaces while the spacer material is removed from the vertical surfaces. This horizontal-surface spacer can then be used in further fabrication. The preferred method can be used in many different processes where there is exists a need to differentially process the vertical and horizontal surfaces of a substrate.

公开(公告)号：SG80083A1

公开(公告)日：2001-04-17

申请号：SG1999005326

申请日：1999-10-22

Applicant: IBM

Inventor： TOSHIHARU FURUKAWA ,  MARK C HAKEY ,  STEVEN J HOLMES ,  DAVID V HORAK ,  PAUL A RABIDOUX

IPC: H01L21/027 ,  H01L21/768 ,  H01L21/32

Abstract: The present invention provides for an improved method of creating vias and trenches during microchip fabrication. According to the invention, the vias and trenches are self-aligned during the photolithography process by using two layers of specially selected resists and exposing the resists such that the lower resist is exposed only where an opening has been formed in the upper resist layer. This self-aligning enables the vias to be printed as elongated shapes, which allows for the use of particularly effective image enhancement techniques. The invention further provides a simplified procedure for creating vias and trenches, in that only one etch step is required to simultaneously create both vias and trenches. An alternative embodiment of the invention allows looped or linked images, such as those printed using image enhancement techniques, to be trimmed to form isolated features.