SIMTEK CORP
SC 13D/A, 2000-03-31
SEMICONDUCTORS & RELATED DEVICES
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D
                 Under the Securities and Exchange Act of 1934
                              (Amendment No. 3)*

                              SIMTEK CORPORATION
                              ------------------
                               (Name of Issuer)

                         Common Stock $0.01 Par Value
                         ----------------------------
                        (Title of Class of Securities)

                                  829204-10-6
                                  -----------
                                (CUSIP Number)

                             Anne L. Neeter, Esq.
                        General Counsel Associates LLP
                              1891 Landings Drive
                        Mountain View, California 94043
                                  (650) 428-3900
                      -----------------------------------
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)

                                March 29, 2000
                                --------------
            (Date of Event which requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box. [_]

*the remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


                                                            Index of Schedules
                                                            located on page 6.
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                                                               Page 2 of 6 Pages

CUSIP NO. 829204-10-6
          -----------

- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1.   S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

              Zentrum Mikroelektronik Dresden GmbH
              No IRS id number
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
 2.                                                             (a) [_]
                                                                (b) [X]
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3.

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS (See Instructions)
 4.
      WC
- ------------------------------------------------------------------------------
      CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
      2(d) or 2(e)
 5.
                                                     [_]
- ------------------------------------------------------------------------------
      CITIZENSHIP OF ORGANIZATION
 6.
      GERMANY
- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7.
     NUMBER OF                 4,547,385

      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8.
                               -0-
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9.
    REPORTING                  4,547,385

      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
                     10.
                               -0-
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11.
                  4,547,385

- ------------------------------------------------------------------------------
      CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
12.
      (See Instructions)
- ------------------------------------------------------------------------------
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                                                               Page 3 of 6 Pages

                                                           [_]
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13.
      15.7%
- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14.
      OO (reporting person is a GmbH)
- ------------------------------------------------------------------------------

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                                                               Page 4 of 6 Pages

Amendment No. 3 to Schedule 13D
- -------------------------------

Zentrum Mikroelektronik Dresden GmbH (the "Reporting Person" or "ZMD") hereby
amends, as set forth below, its Statement on Schedule 13D, filed February 13,
1998 (the "Statement"), as amended by Amendment No. 1, filed on March 22, 2000
("Amendment No. 1") and Amendment No.2 , filed on March 27, 2000 relating to the
Common Stock of Simtek Corporation, a Colorado corporation ("Simtek").
Capitalized terms used herein that are not otherwise defined shall have the
meanings ascribed to them in the Statement, as amended by Amendment No. 1 and
Amendment No. 2.

ITEM 4.  Purpose of the Transaction.

     The 4/th/ and 5/th/ paragraphs of Item 4 set forth in Amendment No. 1
(which amended and restated Item 4 of the Statement in its entirety) are hereby
amended and restated as follows, and the remainder of Item 4 as reflected in
Amendment No. 1 remains in effect:

     ZMD has disposed of an aggregate amount of 13.8% of the outstanding shares
of Common Stock of Simtek.  ZMD's current intent is, depending on market
conditions and other relevant factors, to eventually dispose of all or
substantially all of ZMD's equity interest in Simtek.  The timing of the
disposition or dispositions will depend upon market conditions, the limitations
of Rule 144, the availability of registration of ZMD's shares by Simtek, the
availability of other lawful means of disposition, and other relevant factors
and business considerations from time to time.

     Except as described above and in Amendment No. 1, ZMD has not formulated
any plans or proposals which relate to or would result in any of the items
described in paragraphs (a) through (j) of this item.

ITEM 5.  Interest in Securities of Simtek.

     Item 5 is hereby amended and restated in its entirety as follows:

          (a) ZMD owns 4,547,385 shares of Common Stock of Simtek, which is
15.7% of such class based on 28,955,226 shares of Common Stock outstanding as
reflected in Simtek's December 20, 1999 filing with the SEC.

          (b) ZMD, through its chief executive officers, has the sole power to
direct the vote of the shares of Common Stock and ZMD, through its chief
executive officers acting with approval of the Board of Directors of ZMD, has
the sole power to dispose or direct the disposition of the shares of Common
Stock.

          (c) ZMD has disposed of an aggregate of around 4,000,000 shares of
Common Stock of Simtek under Rule 144, at the then current market price(s), with
transactions
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                                                               Page 5 of 6 Pages

taking place commencing on March 17, 2000 through March 29, 2000.

          (d)  Not applicable.

          (e)  Not applicable.

SIGNATURE

     After reasonable inquiry and to the best of his knowledge and belief, the
undersigned hereby certifies that the information set forth in this statement is
true, complete and correct.

Dated: March 29, 2000         Zentrum Mikroelektronik Dresden GmbH

                              By: /s/ Detlef Golla
                                  ----------------------------------------------
                              Name: Detlef Golla
                              Title: Chief Executive Officer (Geschaeftsfuehrer)

                              By: /s/ Thilo von Selchow
                                  ----------------------------------------------
                              Name:  Thilo von Selchow
                              Title: Chief Executive Officer (Geschaeftsfuehrer)
<PAGE>

                                                               Page 6 of 6 Pages

                              INDEX OF SCHEDULES


             Schedule                              Page
             --------                              ----

                A                                  8 of Amendment No. 1
          Information on controlling
          persons of ZMD (revised and restated
          on Amendment No. 1)


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