Exhibit 10.5

                       FIRST AMENDMENT TO LEASE AGREEMENT

By this private  instrument of first  amendment (the  "Amendment")  to the Lease
Agreement (the  "Agreement")  executed on June 15, 1998, of the property located
at the  Rodovia  Dom  Pedro  I, km  128/129,  number  605,  the  parties  LUCENT
TECHNOLOGIES  NETWORK SYSTEMS DO BRASIL S.A., a corporation  organized under the
laws of Brazil,  enrolled  with the National  Registry of Legal  Entities  under
number  84.512.045/0003-05,  with head offices in the city of Campinas, State of
Sao Paulo,  at the Rodovia Dom Pedro I, km.  128/129  (the  "LESSOR"),  and AVEX
ELECTRONICS DO BRASIL,  LTDA, (now denominated  BENCHMARK  ELECTRONICS LTDA) , a
corporation  organized  under the laws of  Brazil,  enrolled  with the  National
Registry of Legal Entities under number 02.470.563/0001-79, with head offices in
the city of  Campinas,  State of Sao  Paulo,  at the  Rodovia  Dom Pedro 1, 1cm.
128/129 (the "LESSEE")

WHEREAS

LESSOR and LESSEE wishes to extend the term of the Agreement


LESSOR and LESSEE have entered into a certain "General Purchase Agreement number
GPA 1030",  as of February 26, 1998, and a certain  Equipment  Purchase and Sale
Agreement and

Other Covenants, as of June 8, 1998; and

LESSOR and  LESSEE  have  agreed  upon the  conditions  for  termination  of the
Agreement,  in case of expiration or  termination  of the  agreements  mentioned
above;

Now, therefore, LESSOR and LESSEE have agreed to amend the Agreement as follows:

         1 -- LESSOR and LESSEE hereby  mutually agree to extend the term of the
         Agreement for an additional  period of 10 (ten) months,  from June 16th
         2000 to April 30th 2001, so that the leased  property shall be returned
         to LESSOR,  under the terms and conditions set forth in Section 3.1 and
         following of the Agreement, until May 1st , 2001.

         2 .- Effective the date of execution  hereof,  the parties hereby agree
         that Section 5.2 of the Agreement shall read as follows:






         "5.2  LESSOR  may  terminate  the  present  Agreement  in the  event of
         expiration or termination of the "General Purchase Agreement number GPA
         1030" (the "GPA"),  entered by the parties as of February 26, 1998.  In
         any  event,  in  case  of  termination  of the  Agreement  as  provided
         hereunder,  the LESSOR  guaranties  the continuity of the lease and the
         occupation  of the  building  to the  LESSEE  until May 1ST  ,2001,  in
         according to the First Clause of this Amendment above."

         3.- This Amendment  shall be effective the date set forth  hereinbelow,
         and all the other  clauses  and  conditions  of the  Agreement  and its
         attachments which have not been hereby amended, are be hereby ratified.

IN  WITNESS  WHEREOF,  the  parties  have  executed  this  instrument  in  three
counterparts of equal tenor and content, before the two undersigned witnesses.

Campinas, June 14th 2000



Lucent Technologies Network Systems do Brasil S.A.


By:
Title:


Benchmark Electronics Ltd
(ex-AVEX Electronics do Brasil Ltda.).


By: Mareo Antonio Follegatti
Title: General Manager