EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated November 17, 1999 relating to the financial statements, which appears in the 1999 Annual Report to Stockholders of Applied Materials, Inc., which is incorporated by reference in Applied Materials, Inc.'s Annual Report on Form 10-K for the year ended October 31, 1999. We also consent to the incorporation by reference of our report dated November 17, 1999 relating to the financial statement schedule, which appears in such Annual Report on Form 10-K. /s/ PricewaterhouseCoopers LLP San Jose, California April 18, 2000