[*] -- Certain information omitted and filed separately with the Commission
pursuant to a confidential treatment request under Rule 24b-2 of the Commission.


                                 FIRST AMENDMENT
                              TO PURCHASE AGREEMENT


         FIRST AMENDMENT (this "Amendment"), dated and effective as of the 22nd
         day of April, 1997 (the "Effective Date"), to the Purchase Agreement
         dated as of September 6, 1996 (the "Purchase Agreement" or "Agreement")
         between CREE RESEARCH, INC. ("Seller"), a corporation organized under
         the laws of the State of North Carolina, the United States of America,
         and SIEMENS AKTIENGESELLSCHAFT ("Purchaser"), a corporation organized
         under the laws of the Federal Republic of Germany. As used in this
         Amendment, capitalized terms not defined herein which are defined in
         the Purchase Agreement shall have the meaning defined in the Purchase
         Agreement.

In consideration of the mutual provisions below the parties hereby agree as
follows:

1.       The Purchase Agreement is amended by replacing Schedule 1 in its
         entirety with the First Amended Schedule 1 annexed to this Amendment.

2.       The Purchase Agreement is amended by replacing Schedule 2 in its
         entirety with the First Amended Schedule 2 annexed to this Amendment.

3.       The Purchase Agreement is amended by replacing Schedule 3 in its
         entirety with the First Amended Schedule 3 annexed to this Amendment.

4.       Purchaser acknowledges that all Products delivered under the Purchase
         Agreement prior to the Effective Date of this Amendment conformed to
         the then applicable Product Specifications.

5.       Seller and Purchaser will work to improve, among other things, the ESD
         sensitivity of the Product, with a goal of ******* by December 31,
         1997, as provided in Schedule 4 of the Purchase Agreement. However,
         Purchaser has no further obligation to make the services of its
         personnel available under Section 2(a) of Schedule 4, nor is Seller
         obligated to permit Purchaser's personnel into Seller's facilities. If
         by mutual agreement Purchaser's personnel are assigned to work at
         Seller's facilities to assist with the production of or improvement to
         Products to be purchased under this Agreement, then unless otherwise
         agreed in writing the services of such personnel will be governed by
         the terms of Schedule 4 to the Purchase Agreement and be considered
         part of the Joint Development Program.

6.       Except as amended hereby, the terms and conditions of the Purchase
         Agreement shall continue in effect.

IN WITNESS WHEREOF, the parties, through their respective duly authorized
officers, have executed this Amendment to be effective as of the Effective Date
set out in the preamble hereto.




CREE RESEARCH, INC.                                  SIEMENS AKTIENGESELLSCHAFT
                                                                                      
By    /s/ F. Neal Hunter                             By    /s/ R. Mueller                   /s/ C. Hagan
      F. Neal Hunter, President                            R. Mueller, Pres. Opto Semi.     C. Hagan, VP-F&A

Date  April 25, 1997                                 Date  April 25, 1997






                            FIRST AMENDED SCHEDULE 1

                         Quantity and Shipment Schedule

1.       Quantity and Selection.  Purchaser will purchase a total of **********
         ** units of the Product under this Agreement (one unit being one LED
         die). Of the total, ************** units have been shipped prior to
         March 1, 1997, leaving a balance of *************** units to be shipped
         thereafter. All Products shipped on or after March 1, 1997 will be
         either the "***** Part" or the "***** Part," as such terms are defined
         in First Amended Schedule 3. Purchaser may elect to purchase quantities
         of the ***** Part by giving Seller written notice specifying the
         required quantities at least six weeks (i.e., 42 days) prior to the
         beginning of the calendar month in which such quantities are due to be
         shipped pursuant to the provisions of this Schedule. Absent a timely
         election in accordance with the foregoing, all shipments will consist
         solely of ***** Parts.

2.       Shipment Schedule.  The shipment schedule for the remaining ***********
         *** units to be shipped is set out below. Subject to the provisions of
         this Agreement, each monthly quantity shown below shall be shipped on
         the last day of the month unless otherwise mutually agreed.

             --------------------------------- ---------------------------
                          Month                         Quantity
             --------------------------------- ---------------------------
             *                                             *
             *                                             *
             *                                             *
             *                                             *
             *                                             *
             *                                             *
             *                                             *
             *                                             *
             *                                             *
             *                                             *
             --------------------------------- ---------------------------
             Total                                         *
             --------------------------------- ---------------------------

3.       Rescheduling of Shipments. Purchaser may without charge reschedule
         shipment of up to ten percent (10%) of a monthly quantity shown above
         to a date not later than ninety (90) days after the originally
         scheduled shipment date, provided Purchaser gives Seller written notice
         at least ninety (90) days prior to the originally scheduled date.
         Purchaser's notice must specify the quantity to be deferred and the
         date on which shipment is to be made. In no event, however, shall
         Seller be obligated to ship more than ************* units in any
         calendar month. No shipment shall be delayed beyond March 31, 1998.
         Subject to the foregoing, a shipment may be rescheduled any number of
         times under this paragraph.

4.       Cancellation of Shipments.  Purchaser shall be entitled to cancel
         shipment of all or any portion of the monthly quantities scheduled as
         shown above for shipment during the period from October 1997 through
         December 1997, provided Purchaser pays Seller a cancellation charge of
         $***** per unit for all quantities canceled and gives Seller written
         notice specifying the canceled quantities at least ninety (90) days
         prior to the beginning of the calendar month in which such quantities
         are scheduled to be shipped. The cancellation charges shall be due and
         payable within thirty (30) days after the date notice of cancellation
         is given. The parties agree that the amount of such cancellation
         charges represents a reasonable estimate of Seller's damages resulting
         from cancellation of the shipments scheduled during the period from
         October 1997 through December 1997 and shall be due and payable as
         liquidated damages and not as a penalty.

                                     Page 2




                            FIRST AMENDED SCHEDULE 2

                           Price and Payment Schedule

1.       Prices.

         (a)      The prices of the units shipped prior to March 1, 1997 are set
                  forth in the original Schedule 2 to this Agreement. Such
                  prices are final and no adjustment is made by this amended
                  schedule. The prices for the remaining *********** units to be
                  shipped shall be as set forth in paragraphs (b) and (c) below,
                  subject to adjustment as provided in paragraph (d) below.

         (b)      The unit price of ***** Parts shipped on or after March 1,
                  1997 shall be determined in accordance with the following
                  schedule:


                  ----------------------------------------------------- ---------------------------------
                  Incremental Quantities of ***** Part Shipped on or           Unit Price (US$)
                               after March 1, 1997
                  ----------------------------------------------------- ---------------------------------
                                                                      
                                       *                                           *
                                       *                                           *
                                       *                                           *
                                       *                                           *
                                       *                                           *
                                       *                                           *
                                       *                                           *
                   ----------------------------------------------------- ---------------------------------


         (c)      The unit price of ***** Parts shipped on or after March 1,
                  1997 shall be determined in accordance with the following
                  schedule:



                  ----------------------------------------------------- ---------------------------------
                   Incremental Quantities of ***** Part Shipped on or           Unit Price (US$)
                                  after March 1, 1997
                  ----------------------------------------------------- ---------------------------------
                                                                      
                                           *                                           *
                                           *                                           *
                  ----------------------------------------------------- ---------------------------------


         (d)      The per unit price for shipments made on or after May 1, 1997
                  shall be reduced by the applicable amount specified below if
                  the "DM-Dollar Exchange Rate" on the shipment date equals or
                  exceeds 1.75. For purposes of this paragraph, the "DM-Dollar
                  Exchange Rate" means the average of the foreign exchange
                  selling rates for German Marks per U.S. Dollar, as published
                  in the Wall Street Journal during the thirty (30) calendar
                  days preceding the date of shipment, for rates quoted in New
                  York at 3 p.m. Eastern time the preceding business day for
                  trading among banks in amounts of $1 million or more.



                    ------------------------------------------------------------- -------------------------
                                      DM-Dollar Exchange Rate                         Unit Price (US$)
                                                                                         Reduction
                    ------------------------------------------------------------- -------------------------
                                                                                
                    Less than 1.75                                                          --
                    Equal to or greater than 1.75 and less than 1.80                         *
                    Equal to or greater than 1.80 and less than 1.90                         *
                    Equal to or greater than 1.90                                            *
                    ------------------------------------------------------------- -------------------------


                                     Page 3




         (e)      The reduction in per unit prices for larger quantities of each
                  part reflects Seller's expectation that it will improve
                  manufacturing yields and reduce per unit costs for a part as
                  the quantities of that part manufactured increase.
                  Nonetheless, the prices shown above are firm and will apply
                  regardless of whether Seller is able to reduce its costs or
                  when such reductions may be achieved. Further, it is
                  understood and agreed that the prices for units shipped shall
                  be determined by the schedules above notwithstanding any
                  earlier termination of this Agreement.

         (f)      Purchaser acknowledges that the Products to be shipped under
                  this Agreement have different specifications than the standard
                  products generally offered by Seller and that the prices in
                  this Agreement may be higher than the prices Seller charges
                  for its standard products. If Seller commences offering a
                  standard product having the same specifications as the
                  Products to be purchased under this Agreement, and if the
                  prices charged by Seller for purchase of the standard product,
                  under terms and conditions comparable to those of this
                  Agreement, are less than the prices applicable to the Products
                  not then shipped hereunder, Seller will offer in writing to
                  amend this Agreement to reduce the prices applicable to
                  Products not then shipped hereunder to the prices Seller
                  charges for the standard product.

2.       Payment Terms.

         The balance of the purchase price of units shipped prior to March 1,
         1997 will be paid in accordance with the terms of the original Schedule
         2. The price of the remaining ********* units will be invoiced to
         Purchaser upon shipment and shall be due and payable within twenty (20)
         days from the date of the invoice.

         Purchaser acknowledges that Seller has shipped all Products for which
         Purchaser advanced payment under this Agreement, that all secured
         obligations under the Security Agreement between the parties dated
         October 1, 1996 are therefore discharged, and that such Security
         Agreement has expired in accordance with its terms.

                                     Page 4




                            FIRST AMENDED SCHEDULE 3

                             Product Specifications

1.       Product Specifications for Products shipped prior to March 1, 1997
         shall be those set forth in the original Schedule 3 and Attachment A to
         the Agreement. Product Specifications for Products shipped on and after
         March 1, 1997 shall be the specifications set forth in Attachment A
         annexed to this First Amended Schedule 3.

2.       Seller may elect to substitute a version of either or both of the
         Products (the ***** Part or the ***** Part) which uses a conductive
         buffer layer, subject to Purchaser's approval which shall be given
         under the terms and conditions set forth below. Commencing thirty (30)
         days after the date of such approval, or such earlier date as may be
         agreed by the parties, the Product Specifications applicable to
         shipments made thereafter shall be the specifications of the new
         version supplied by Seller as provided below, and Seller may not ship
         the original version without Purchaser's prior written consent.

         (a)      The new version must meet the original specifications except
                  that*********************************************************
                  ************************************************************
                  ********************************************.

         (b)      Seller will provide Purchaser with production prototypes of
                  the new version manufactured from wafers from at least three
                  different epi runs and will provide Purchaser the
                  specifications applicable to the new version and such
                  qualification data as may then be available to Seller.

         (c)      Purchaser will give Seller notice of Purchaser's approval or
                  disapproval within seventy-five (75) days after receipt of the
                  prototypes and specifications.

         (d)      Purchaser may withhold its approval only if new version does
                  not meet the minimum specifications described in (a) above.

                                     Page 5




Information in attachment omitted in its entirety and               ATTACHMENT A
filed separately with the Commission pursuant to a confidential
treatment request under Rule 24b-2 of the Commission.