The grades of 3 Semiconductors & Semiconductor Equipment stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This week, Lam Research Corporation (LRCX) pushes up from a C to a B rating. Lam Research Corporation manufactures, markets, and services semiconductor processing equipment used in the making of integrated circuits. The company also gets A’s in sales growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of LRCX stock.

Mellanox Technologies, Ltd.’s (MLNX) ratings are looking better this week, moving up to a B from last week’s C. Mellanox Technologies, Ltd. designs and develops semiconductor-based, high-performance interconnect products. The company also gets A’s in sales growth, earnings growth, and earnings revisions. For more information, get Portfolio Grader’s complete analysis of MLNX stock.

Alpha and Omega Semiconductor Limited (AOSL) boosts its rating from a C to a B this week. Alpha and Omega Semiconductor Limited designs, develops, and supplies a range of power semiconductors worldwide. For more information, get Portfolio Grader’s complete analysis of AOSL stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.