The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 2002
Filed:
Jul. 11, 2001
Karl M. Robinson, Boise, ID (US);
David L. Chapek, Boise, ID (US);
Micron Technology, Inc., Boise, ID (US);
Abstract
A thermal reflow processing system has a rotatable structure to which articles having a reflowable surface are attached. The structure is coupled to a drive motor which causes the structure to rotate at speeds which generate centripetal forces in excess of that of gravity. The system is equipped with at least one radiant heat source. As the articles are being subjected to a centripetal force, the surface is heated by the radiant heat source. In a preferred embodiment, the structure is a hermetically-sealable chamber which can be pressurized or evacuated. The articles, which may be semiconductor wafers, are positioned on the rotating structure such that the surface to be reflowed faces both the heat source and the structure's rotational axis. In the case of circular semiconductor wafers, the wafers are positioned such that the planar surface of each wafer is centered on and perpendicular to a radius of the cylindrical chamber. By performing the reflow operation while the chamber is spinning, high pseudo-gravitational forces can be generated which aid in planarization, void elimination, densification and in the filling of small aspect ratio contact via openings.