3 Semiconductors & Semiconductor Equipment stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

KLA-Tencor Corporation (KLAC) boosts its rating from a C to a B this week. KLA-Tencor Corporation manufactures yield management and process monitoring systems for the semiconductor industry. The company also gets A’s in earnings growth, earnings revisions, earnings surprise, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of KLAC stock.

This week, MKS Instruments, Inc. (MKSI) pushes up from a C to a B rating. MKS Instruments, Inc. provides instruments, subsystems, and process control solutions that measure, control, power, monitor, and analyze critical parameters to improve the process performance and productivity of advanced manufacturing processes. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of MKSI stock.

This week, Ultratech, Inc.’s (UTEK) ratings are up from a C last week to a B. Ultratech, Inc. manufactures laser thermal processing equipment. For more information, get Portfolio Grader’s complete analysis of UTEK 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.