SI Diamond Technology Announces Open House

Austin, Texas – June 4, 2003 – PRNewswire-FirstCall – SI Diamond Technology, Inc. (OTC BB: SIDT) today announced an investor open house on Tuesday, June 10, 2003 from 1:00 p.m. to 4:00 p.m. Central Time at its offices at 3006 Longhorn Boulevard, Suite 107, Austin, Texas 78758. During the open house, the Company will demonstrate its recent advances in carbon nanotube television technology, advances in using nanomaterials for sensors, and other technical achievements. Company representatives will also be available to answer questions.

The open house will follow the Company's annual shareholder meeting. The shareholder meeting will be held at the Renaissance - Austin Hotel, 9721 Arboretum Boulevard, Austin, Texas 78759 on Tuesday, June 10 2003 at 10:00 a.m. Central Daylight Time. Maps from the meeting to the company offices will be available at the meeting.

Safe Harbor Statement

This press release contains forward-looking information within the meaning of Section 27A of the Securities Act of 1933, and Section 21E of the Securities Act of 1934, and is subject to the safe harbor created by those sections. The Company's actual results could differ materially from those projected in the forward-looking information. Future results may be impacted by risk factors listed from time to time in SIDT's SEC reports. SI Diamond Technology, Inc. disclaims any intent or obligation to update forward-looking information.

SI Diamond Technology is a holding company consisting of two wholly owned operating subsidiaries. Applied Nanotech, Inc. is a premier research and development organization dedicated to developing applications for nanotechnology with an extremely strong position in the field of electron emission applications from carbon film/nanotubes. Electronic Billboard Technology, Inc. (EBT) is geared toward licensing its technology related to electronic digitized sign technology. SI Diamond Technology's website is

Company Contact:
Doug Baker
Applied Nanotech Holdings, Inc.

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