Browse Prior Art Database

Nozzle for Extrusion Screening

IP.com Disclosure Number: IPCOM000081190D
Original Publication Date: 1974-Apr-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Deyo, LW: AUTHOR [+2]

Abstract

Electrode screening by extrusion printing on substrates supporting large-scale integrated (LSl) devices is improved by, (1) increasing the nozzle contact area relative to the substrate, and (2) fabricating the nozzle to traverse the substrate in coplanar relation, but at an angle greater than zero but less than forty-five degrees to the orientation of the substrate. The increased nozzle area and orientation relative to the substrate achieves, (1) reduced voids and smears in the screened electrode, (2) decreased electrode material, and (3) increased production rate.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 78% of the total text.

Page 1 of 2

Nozzle for Extrusion Screening

Electrode screening by extrusion printing on substrates supporting large- scale integrated (LSl) devices is improved by, (1) increasing the nozzle contact area relative to the substrate, and (2) fabricating the nozzle to traverse the substrate in coplanar relation, but at an angle greater than zero but less than forty-five degrees to the orientation of the substrate. The increased nozzle area and orientation relative to the substrate achieves, (1) reduced voids and smears in the screened electrode, (2) decreased electrode material, and (3) increased production rate.

Fig. 1 shows a meshless molybdenum mask 10 including the active area 12, through which a substrate 14 is exposed to receive an electrode pattern 16. Extrusion screening apparatus, not shown, includes a nozzle 18 which traverses the mask 10, and at an appropriate time determined by the screening apparatus, deposits the electrode pattern 16. The nozzle 18 is fabricated to extend beyond the mask area 12. The enlarged nozzle increases the contact area on the portion of the mask 10 outside the area 12. The increased contrast area reduces the pressure on the mask 10. The nozzle pressure on the region 12 is also reduced, which contributes to improved pattern definition for the members 16.

The nozzle approach area 20 is oriented between zero to forty-five degrees relative to the access of printing in the area 12.

The oriented angle of the nozzle 18 reduces the number of voids an...