This week, seven semiconductor stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

M/A-COM Technology Solutions Holdings, Inc. (MTSI) is making headway this week, with the company’s rating improving to an A (“strong buy”) from a B (“buy”) last week. In Portfolio Grader’s specific subcategories of Earnings Momentum, Earnings Revisions and Sales Growth, MTSI also gets A’s. M/A-COM Technology Solutions designs, develops, manufactures, and markets semiconductors and modules for use in wireless and wireline applications across the radio frequency, microwave, and millimeterwave spectrum. For more information, get Portfolio Grader’s complete analysis of MTSI stock.

FSI International (FSII) improves from a B to an A rating this week. FSI International is a supplier of processing equipment used at key production steps to manufacture microelectronics, including semiconductor devices and thin film heads. For more information, get Portfolio Grader’s complete analysis of FSII stock.

CVD Equipment Corporation (CVV) is making progress this week as its rating of C (“hold”) from last week increases to a B (“buy”) rating this week. CVD Equipment develops, manufactures, and markets chemical vapor deposition equipment, annealing furnaces, and etching systems. For more information, get Portfolio Grader’s complete analysis of CVV stock.

This is a strong week for International Rectifier Corporation (IRF). The company’s rating climbs to B from the previous week’s C. International Rectifier is engaged in the design, manufacture, and marketing of power management semiconductors. For more information, get Portfolio Grader’s complete analysis of IRF stock.

FormFactor, Inc. (FORM) earns a B this week, jumping up from last week’s grade of C. FormFactor designs, develops, and manufactures advanced semiconductor wafer probe cards. For more information, get Portfolio Grader’s complete analysis of FORM stock.

Hittite Microwave Corporation (HITT) is seeing ratings go up from a C last week to a B this week. Hittite Microwave designs and develops integrated circuits, modules, and subsystems for radio frequency, microwave, and millimeter wave applications. For more information, get Portfolio Grader’s complete analysis of HITT stock.

The rating of Semiconductor Manufacturing International Corp. Sponsored ADR (SMI) moves up this week, rising from a C to a B. Semiconductor Manufacturing International manufactures, trades, packages, tests, and provides computer-aided design integrated circuits. For more information, get Portfolio Grader’s complete analysis of SMI 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.