Patents Assigned to InterUniversitaire Microelektronica
  • Patent number: 6334902
    Abstract: A method and an apparatus for removing a liquid, i.e. a wet processing liquid, from at least one surface of at least one substrate is disclosed. A liquid is supplied on a surface of substrate. Simultaneously or thereafter the liquid or the substrate is locally heated to thereby reduce the surface tension of said liquid. By doing so, at least locally a sharply defined liquid-ambient boundary is created. According to one aspect of the invention, the substrate is subjected to a rotary movement at a speed to guide said liquid-ambient boundary over the surface of the substrate thereby removing said liquid from said surface.
    Type: Grant
    Filed: June 15, 1999
    Date of Patent: January 1, 2002
    Assignee: Interuniversitair Microelektronica Centrum (IMEC)
    Inventors: Paul Mertens, Marc Meuris, Marc Heyns
  • Patent number: 6319736
    Abstract: The present invention is related to an apparatus and a non-destructive method for determining the porosity of an element, particularly a thin film, formed on a substrate, said substrate being positioned in a pressurized chamber, said chamber being at a predetermined pressure and at a predetermined temperature. According to this method a gaseous substance like e.g. toluene vapor is admitted in said chamber and after a predetermined period of time the porosity of the thin film is determined by means of at least on ellipsometric measurement. Particularly, the optical characteristics resulting from this in-situ ellipsometry are used to determine the amount of gaseous substance condensed in the pores of the film. These amounts are used to calculate the porosity of the film.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: November 20, 2001
    Assignee: Interuniversitair Microelektronica Centrum (IMEC)
    Inventors: Mikhail Rodionovich Baklanov, Fedor Nikolaevich Dultsev, Konstantin Petrovich Mogilnikov, Karen Maex
  • Patent number: 6282124
    Abstract: The present invention is a method for programming SSI cells or an array of said cells. The method achieves very fast programming while consuming only a very small amount of power, which paves the way for new applications such as battery-operated systems, page-mode programming for very high data throughput. The method also allows for the bitline voltage to be increased internally on the chip in order to circumvent the efficiency decrease associated with supply voltage scaling. By exploring the SSI mechanism in the subthreshold regime, an optimum value for the CG voltage is found for which the gate current is no longer maximized, but the energy consumed from the power supply is minimized and the injection efficiency during programming is maximized. The programming of a memory cell in this regime, where the gate current is a very steep function of the CG voltage, is, however, still achieved in a few microseconds while consuming only a very small cell current in the range of nanoamperes.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: August 28, 2001
    Assignee: Interuniversitair Microelektronica Centrum (IMEC, vzw)
    Inventors: Jan F. Van Houdt, Luc Haspeslagh, Ludo Deferm, Guido Groeseneken, Herman Maes
  • Patent number: 6278410
    Abstract: The present invention provides a planar antenna having a first, outer planar conductive element and a second planar conductive element located in a hole in the outer element. At least 75% of the boundary between the hole and the first outer planar conductive element is a continuous concave smooth curve. The second planar conductive element is substantially coplanar with and surrounded by the first outer planar conductive element. At least 75% of the outer boundary of the second planar conductive element is a continuously convex smooth curve.
    Type: Grant
    Filed: November 29, 1999
    Date of Patent: August 21, 2001
    Assignees: Interuniversitair Microelektronica Centrum, Katholieke Universiteit Leuven Research & Development
    Inventors: Ezzeldin Soliman, Eric Beyne, Walter De Raedt, Guy Vandenbosch
  • Patent number: 6261377
    Abstract: The present invention is related to a method of removing particles and a liquid from a surface of a substrate using at least one rotating cleaning pad. The approach, according to the present invention, is a technique wherein a sharp liquid-vapor boundary is created on the surface of the substrate adjacent to the last wetted rotating cleaning pad of a plurality of rotating cleaning pads and particularly between this last wetted rotating cleaning pad and a first edge of the substrate.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: July 17, 2001
    Assignee: Interuniversitair Microelektronica Centrum (IMEC)
    Inventors: Paul Mertens, Mark Meuris, Marc Heyns
  • Patent number: 6255227
    Abstract: The present invention relates to methods for controlling the etching rate of CoSi2 layers by adjusting the pH of an HF-based solution to obtain the desired etch rate. The pH of the HF-based solution may be adjusted by adding pH modifying chemicals to the solution. A further aspect of the invention is an improved method for manufacturing Schotky barrier infared detectors employing the controlled etching step. A method for reducing drain induced barrier lowering in an active transistor having a small gate length is also provided.
    Type: Grant
    Filed: January 6, 2000
    Date of Patent: July 3, 2001
    Assignee: Interuniversitair Microelektronica Centrum
    Inventors: Ricardo Alves Donaton, Karen Irma Josef Maex, Rita Verbeeck, Philippe Jansen, Rita Rooyackers, Ludo Deferm, Mikhail Rodionovich Baklanov
  • Patent number: 6247481
    Abstract: An apparatus for wet cleaning or etching of flat substrates comprising a tank with an inlet opening and outlet opening for said substrates. Said tank contains a cleaning liquid and is installed in a gaseous environment. At least one of the openings is a slice in a sidewall of the tank and is present below the liquid-surface. In the tank there may be a portion above the liquid filled with a gas with a pressure being lower than the pressure within said environment. The method comprises the step of transferring a substrate through the cleaning or etching liquid at a level underneath the surface of said liquid making use of said apparatus.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: June 19, 2001
    Assignee: Interuniversitair Microelektronica Centrum (IMEC)
    Inventors: Marc Meuris, Paul Mertens, Marc Heyns
  • Patent number: 6207977
    Abstract: The present invention relates to processes for fabrication of Vertical MISFET devices or a stack of several of such devices. The Vertical MISFET device comprises a highly doped drain region, a non or lowly doped channel region and a source region forming a heterojunction with the channel region. The source region comprises a lowly doped part which contacts the channel region and a highly doped part which contacts the lowly doped part.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: March 27, 2001
    Assignee: InterUniversitaire Microelektronica
    Inventor: Carlos Jorge Ramiro Proenca Augusto
  • Patent number: 6191431
    Abstract: A device for emitting radiation it a predetermined wavelength is disclosed. The device has a cavity comprising a first bulk region and a second bulk region of opposite conductivity type wherein a barrier is provided for spatially separating the charge carriers of the first and the second region substantially at the antinode of the standing wave pattern of said cavity. The recombination of the charge carriers at the barrier create radiation, the emission wavelength of the radiation being determined by the cavity.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: February 20, 2001
    Assignee: Interuniversitair Microelektronica Centrum (IMEC)
    Inventors: Chris Van Hoof, Hans De Neve, Gustaaf Borghs
  • Patent number: 6153018
    Abstract: Process for rinsing a metallized substrate subject to metal microcorrosion using an acidic aqueous rinsing solution wherein the rinsing solution comprises at least one strong inorganic acid in an amount enough to reduce the alkalinity of the rinse solution to a level low enough to reduce microcorrosion of the said metal layer while rinsing.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: November 28, 2000
    Assignee: Interuniversitair Microelektronica Centrum
    Inventors: Antonio L. P. Rotondaro, Rita Vos, Mark Heyns
  • Patent number: 6071825
    Abstract: The present invention relates to methods for fabricating Fully Overlapped Nitride-Etch Defined (Fond) devices. These methods permit the lateral dimension and depth of the lowly-doped source and drain extensions to be independently controlled and well defined.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: June 6, 2000
    Assignee: InterUniversitaire Microelektronica Centrum (IMEC VZW)
    Inventor: Ludo Deferm