| Here's the available information on the PE Ratio and F-Score for the requested companies. Please note that F-Score (Piotroski F-Score) is typically a value from 0 to 9, where a higher score indicates a healthier financial position. PE ratios can fluctuate, and the most recent available data is provided. 
 
 Important Considerations:Advantest Corp (ADTTF)
 
 PE Ratio (Normalized): 34.05 (Morningstar)
 
Piotroski F-Score: 7/9 (GuruFocus)
 
Cohu, Inc. (NASDAQ: COHU)
 
 PE Ratio: The current PE ratio cannot be calculated as the latest EPS is negative. The last recorded PE ratio was 59.98 in December 2023. (FullRatio)
 
Piotroski F-Score: 3/9 (Fintel)
 
Kulicke and Soffa Industries, Inc. (NASDAQ: KLIC)
 
 PE Ratio: 96.53 as of June 27, 2025 (FullRatio); 87.19 (StockAnalysis)
 
Piotroski F-Score: 6 (StockAnalysis); 5 (Validea)
 
Camtek Ltd. (NASDAQ: CAMT)
 
 PE Ratio: 28.89 as of July 1, 2025 (FullRatio); 28.7 (Validea); 28.16 (GuruFocus)
 
Piotroski F-Score: 7 (Validea)
 
Nordson Test & Inspection (Part of Nordson Corporation, NASDAQ: NDSN)
 
 PE Ratio: Nordson Corporation (NDSN) as a whole has a PE ratio of 27.26 as of June 30, 2025 (Fintel) or 22.80 as of July 2, 2025 (Macrotrends). Information specifically for the "Test & Inspection" segment's PE ratio is not readily available as it's a part of the larger corporation.
 
Piotroski F-Score: 6/9 for Nordson Corporation (NDSN) as a whole (Fintel)
 
 
 
 PE Ratios Vary: PE ratios can differ slightly across sources due to different calculation methodologies (e.g., trailing twelve months, forward-looking, normalized EPS).
 
Negative EPS: When a company has negative earnings per share (EPS), the PE ratio is typically not calculable or meaningful.
 
F-Score Interpretation: A higher F-Score suggests stronger financial health, but it's just one metric and should be considered alongside other financial analyses.
 
Segment Data: For companies that are part of a larger corporation (like Nordson Test & Inspection), specific financial metrics like PE ratios for a particular segment are usually not reported publicly. The PE and F-Score would typically refer to the parent company.
 
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 You're asking a great question! Identifying "pure play" backend semiconductor test equipment companies can be a bit nuanced because some larger companies have diverse portfolios. However, here are some other notable players that are primarily focused on the backend of semiconductor manufacturing, particularly in test and assembly, along with their available PE and PEG ratios.
 
 It's important to remember that PE and PEG ratios are dynamic and can change frequently. The values provided are based on the latest available data as of early July 2025.
 
 Other Pure-Play Backend Semi Test Equipment Companies:
 
 
 Teradyne, Inc. (NASDAQ: TER)
 
 Teradyne is a major player in semiconductor test equipment, with a strong focus on both front-end and back-end testing. While not exclusively backend, a significant portion of their business is dedicated to final test.
 
PE Ratio: 25.24 (FullRatio); 23.05 (StockAnalysis)
 
PEG Ratio: N/A (StockAnalysis) - PEG ratio may not be provided if earnings growth is negative or highly volatile.
 
FormFactor, Inc. (NASDAQ: FORM)
 
 FormFactor is a leading provider of probe cards, which are essential for wafer test (front-end) and increasingly for advanced packaging and final test (backend). They are considered a key enabler for advanced semiconductor testing.
 
PE Ratio: 49.87 (FullRatio); 46.38 (Nasdaq estimates for 2025)
 
PEG Ratio: 3.78 (Nasdaq estimates for 2025 growth)
 
Aehr Test Systems (NASDAQ: AEHR)
 
 Aehr Test Systems focuses on burn-in and test solutions for a wide range of semiconductor devices, which is a critical part of the backend manufacturing process, especially for memory and automotive chips.
 
PE Ratio: 15.65 (FullRatio)
 
PEG Ratio: Data not readily available through standard financial sources, often due to high growth volatility or specific analyst coverage.
 
inTEST Corporation (NYSE American: INTT)
 
 inTEST provides a range of test and process solutions for the semiconductor and other industries, including thermal management and test handlers, which are relevant to backend testing.
 
PE Ratio: N/A (FullRatio) - Currently, EPS is negative or highly volatile, so a meaningful PE ratio cannot be calculated.
 
PEG Ratio: N/A
 
 
 Considerations for "Pure Play"
 
 
 It's always recommended to consult up-to-date financial data from reputable sources (e.g., company financial reports, major financial news outlets like Bloomberg, Reuters, Nasdaq, etc.) for the most current PE and PEG ratios, as these figures can change daily.Diversification: Many companies in the semiconductor equipment space are diversifying their offerings to cover various stages of manufacturing (front-end, backend, packaging, etc.). A truly "pure-play" backend company might be smaller or highly specialized.
 
Segment Reporting: For larger companies, it can be challenging to get specific PE and PEG ratios for individual segments like "test & inspection" if they are part of a broader corporate structure.
 
PEG Ratio Interpretation: A PEG ratio below 1 is generally considered favorable, suggesting a stock may be undervalued relative to its growth potential. A higher PEG ratio (above 1) could indicate it's overvalued, or that growth is not keeping pace with the PE. However, it's not a standalone metric and should be used in conjunction with other analysis.
 
 
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 Based on this quick review;     Teradyne Inc (TER) is the best candidate for 'backend' test equipment.
 
 AMAT & TER could be good Buy & hold candidates
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