---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/100000000697604.md"
description: "Testing: The critical bottleneck in CPO mass production (TrendForce)The current testing approach is manual + non-standardized.Which creates a severe throughput bottleneck.For Testing exposure:-> $Formfactor(FORM.US): probe cards/systems-> $Onto Innovation(ONTO.US): inspection + metrology-> $Camtek(CAMT.US): inspection + metrology-> $Keysight Tech(KEYS.US): photonic/optical test-> $Viavi Solutions(VIAV.US): photonic/optical test-> $Aehr Test(AEHR.US): burn-in + testIn case anyone wanted to do further research.Names like $Teradyne(TER.US), Advantest, and Chroma ATE also fall here.So since $Taiwan Semiconductor(TSM.US)'s COUPE targets volume production in 2026...solving the testing bottleneck is one of the key unlocks for CPO to scale.Along with things like lasers, FAU, substrates, and advanced packaging.Disclosure: I personally have a position in Aehr."
datetime: "2026-05-28T19:57:18.000Z"
locales:
  - [en](https://longbridge.com/en/topics/100000000697604.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/100000000697604.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/100000000697604.md)
author: "[Paradi Lab](https://longbridge.com/en/profiles/27651407.md)"
generator: "portal-rs"
---

# Testing: The critical bottleneck in CPO mass produ…


### Related Stocks

- [AEHR.US](https://longbridge.com/en/quote/AEHR.US.md)
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- [TSM.US](https://longbridge.com/en/quote/TSM.US.md)

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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**