Multi-Fineline Electronix (MFLX)

To Be Held March 21, 2006

To the Stockholders of Multi-Fineline Electronix, Inc.:

The Annual Meeting of Stockholders of Multi-Fineline Electronix, Inc., a Delaware corporation (the “Company”), will be held at the Hyatt Regency Irvine Hotel at 17900 Jamboree Blvd., Irvine, California 92614 on Tuesday, March 21, 2006, at 9:00 a.m. Pacific Standard Time, for the following purposes:

1. To elect two Class II directors to serve until the 2009 Annual Meeting of Stockholders or until their successors are duly elected and qualified;

2. To ratify the appointment of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm;

3. To approve the amendment and restatement of the Company’s 2004 Stock Incentive Plan; and

4. To transact such other business as may properly come before the Annual Meeting and any adjournment or postponement of the Annual Meeting.

Stockholders of record as of the close of business on January 23, 2006 are entitled to notice of and to vote at the Annual Meeting and any adjournment or postponement thereof. A complete list of stockholders entitled to vote at the Annual Meeting will be available at the Secretary’s office, 3140 East Coronado Street, Anaheim, California 92806, for ten days before the meeting.