This week, the overall grades of 7 Semiconductors & Semiconductor Equipment stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Intersil Corporation Class A (ISIL) earns a D this week, moving down from last week’s grade of C. Intersil Corporation Class A designs and manufactures high performance analog semiconductors. The company also gets F’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of ISIL stock.

CVD Equipment Corporation (CVV) slips from a C to a D this week. CVD Equipment Corporation develops, manufactures, and markets chemical vapor deposition equipment, annealing furnaces, and etching systems. The company also gets F’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of CVV stock.

This week, Amtech Systems, Inc. (ASYS) drops from a C to a D rating. Amtech Systems, Inc. engages in the design, assembly, sale, and installation of capital equipment and related consumables used in the manufacture of wafers, primarily for the solar and semiconductor industries. The company also gets F’s in earnings revisions and return on equity. For more information, get Portfolio Grader’s complete analysis of ASYS stock.

Kopin Corporation (KOPN) experiences a ratings drop this week, going from last week’s C to a D. Kopin Corporation develops and manufactures semiconductor materials and small form factor displays. The company also gets F’s in sales growth, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of KOPN stock.

AXT, Inc. (AXTI) gets weaker ratings this week as last week’s C drops to a D. AXT, Inc. designs, develops, manufactures, and distributes compound and single element semiconductor substrates for use in wireless communications, lighting display applications, and fiber optic communications. The company also gets F’s in sales growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of AXTI stock.

Pixelworks, Inc. (PXLW) declines this week from a C to a D. Pixelworks, Inc. designs and develops system-on-a-chip solutions. The company also gets F’s in earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of PXLW stock.

Slipping from a C to a D rating, MoSys, Inc. (MOSY) takes a hit this week. MoSys, Inc. designs, develops, markets and licenses embedded memory intellectual property, or IP, used by the semiconductor industry and electronic product manufacturers. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of MOSY 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.