| Here is Perplexity.ai take on the differences between the two companies. On the surface it looks like COHI tests packaged chips while AEHR tests at the wafer level. 
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 What are the differences between the product offering of the stocks with the symbols AEHR and COHU?
 
 Sources
 
 Answer
 
 Price Comparison
 Updated Dec 17, 9:31 a.m. PST
 
 AEHR:NASDAQ
 US$14.48USD
 
 0.07% · US$0.0096
 
 COHU:NASDAQ
 US$27.50USD
 
 0.92% · US$0.26
 
 
 
 AEHR
 
 COHU
 
 
 9:30 a.m.10:17 a.m.10:56 a.m.11:47 a.m.-2.0%0.0%2.0%4.0%6.0%
 
 AEHR
 2024-12-17
 
 OpenUS$15
 HighUS$16
 LowUS$14
 Market CapUS$429M
 P/E Ratio15
 Volume1.9M
 Year HighUS$30
 Year LowUS$9.8
 
 COHU
 2024-12-17
 
 OpenUS$28
 HighUS$29
 LowUS$27
 Market CapUS$1.3B
 P/E Ratio-25
 Volume114K
 Year HighUS$37
 Year LowUS$23
 
 Aehr Test Systems (AEHR) and Cohu, Inc. (COHU) both operate in the semiconductor industry but offer different product lines: Aehr Test Systems (AEHR)
 Cohu, Inc. (COHU) While specific product details for Cohu are not provided in the  search results, we can infer the following based on industry knowledge:Specializes in wafer-level burn-in semiconductor testing 3
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Primary products include the FOX-P series testers,  which require WaferPak Contactors and WaferPak Aligners for full test  process automation 3
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Offers FOX-XP and FOX-NP systems for full wafer contact and singulated die/module test and burn-in 4
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Recently expanded into AI processor testing with  wafer-level burn-in solutions capable of delivering thousands of watts  of power per wafer at temperatures up to 150 degrees Celsius 7
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Unique in offering both wafer-level and package-level turnkey test and burn-in solutions for AI processors 7
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 The key difference is that Aehr focuses on wafer-level burn-in and  test solutions, particularly for power semiconductors and now AI  processors, while Cohu offers a wider range of semiconductor test and  inspection equipment, likely at the packaged device level.Cohu is generally known for providing a broader range of semiconductor test and inspection equipment.Their product line typically includes handlers, test contactors, and inspection systems for semiconductor devices.Unlike Aehr's focus on wafer-level testing, Cohu's products are often used for testing packaged semiconductors.
 
 Related
 
 What industries do AEHR and COHU primarily serve
 
 How do the market caps of AEHR and COHU compare
 
 What are the recent financial performances of AEHR and COHU
 
 How do the price trends of AEHR and COHU differ over the past year
 
 What are the main products offered by AEHR and COHU
 
 What industries do AEHR and COHU primarily serve
 
 Sources
 
 Answer
 
 Price Comparison
 Updated Dec 17, 9:30 a.m. PST
 
 AEHR:NASDAQ
 US$14.54USD
 
 0.33% · US$0.047
 
 COHU:NASDAQ
 US$27.50USD
 
 0.92% · US$0.26
 
 Both  Aehr Test Systems (AEHR) and Cohu, Inc. (COHU) primarily serve the  semiconductor industry, but they focus on different aspects: Aehr Test Systems (AEHR):
 Cohu, Inc. (COHU):Specializes in semiconductor test and burn-in systems, particularly for wafer-level testing 4
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Focuses on burn-in and testing of logic, optical, and memory integrated circuits 4
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Serves high-growth markets such as power compound semiconductors and silicon photonics 3
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Provides solutions for testing silicon carbide power devices used in electric vehicles 2
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 Both companies cater to the semiconductor industry, but Aehr  focuses more on wafer-level testing and burn-in, especially for emerging  technologies like silicon carbide, while Cohu offers a wider range of  products for various stages of semiconductor manufacturing and testing.Supplies a broad range of test, automation, inspection, and metrology products for semiconductor manufacturing 5
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Offers solutions for back-end semiconductor manufacturing, including handlers, test contactors, and inspection systems 5
 
 6
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Provides equipment for testing and handling packaged semiconductor devices 6
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