EXHIBIT 4.1 ADOPTION AGREEMENT PROFIT SHARING 401(k) PLAN Name of Employer: Lam Research Corporation Name of Plan: Savings Plus Plan, Lam Research 401(k) Former Name of Plan: Lam Research 401(k) Savings Plan Name of Trust: Savings Plus Plan, Lam...Adoption Agreement • March 20th, 2002 • Lam Research Corp • Special industry machinery, nec • California
