積層、積み重ね：stack, laminate

素子実装層と、素子実装層上に積層され開口部を有する基材層とを有する、半導体素子実装用基板

ChatGPT:

A clear and technically appropriate English translation of:
素子実装層と、素子実装層上に積層され開口部を有する基材層とを有する、半導体素子実装用基板
is:

a substrate for mounting semiconductor devices, including a device mounting layer and a base material layer that is laminated on the device mounting layer and has an opening

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🔍 Breakdown and Reasoning:

Japanese	English	Notes
半導体素子実装用基板	a substrate for mounting semiconductor devices	Standard, precise technical phrase
素子実装層	device mounting layer	Literally and functionally accurate
素子実装層上に積層され	laminated on the device mounting layer	Passive, clear, and conventional
開口部を有する基材層	a base material layer that has an opening	Clear and correct
とを有する	including or having	"Including" is a bit more formal and patent-friendly; "having" is more concise

 

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✍️ Slight variations depending on context:

✅ For patents or formal documentation:

a substrate for mounting semiconductor devices, comprising a device mounting layer and a base material layer laminated on the device mounting layer and having an opening

• “comprising” is often preferred in claims for its open-ended nature

• Very common phrasing in patent language

✅ For datasheets or technical manuals:

a substrate for mounting semiconductor devices, having a device mounting layer and a base material layer with an opening formed thereon

あなた:

Why "laminated" and not "stacked"?

ChatGPT:

Excellent question — and your instinct to question the distinction between "laminated" and "stacked" is spot on, especially in technical translation.

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🔍 Why "laminated" is preferred over "stacked" in this context:

✅ 1. Technical Accuracy

In electronics and substrate fabrication, the Japanese term 積層 (used in 積層され) is typically understood to mean:

Layered and bonded, often by pressure, heat, or adhesive — not just placed on top.

This aligns with the English technical term “laminated”, which implies:

• Bonding or integrating multiple layers into a unified structure

• A deliberate manufacturing process, not a loose or temporary arrangement

🔧 Example: “A laminated substrate consists of multiple dielectric and conductive layers.”

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⚠️ 2. "Stacked" sounds too loose or temporary

• "Stacked" generally means placed on top of each other, often without bonding.

• It may suggest a pile or assembly that is not mechanically or functionally integrated.

Compare:

• “Books are stacked on a table.” ❌ (not bonded)

• “Copper and resin are laminated to form a multilayer PCB.” ✅

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📘 In semiconductor substrate terminology:

Japanese term	Common English term	Notes
積層基板	laminated substrate	Very standard phrase
積層される層	a layer laminated on ...	Implies process, bonding
積み重ねる	stack (literal)	Used for physical stacking, not fabrication

 

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✅ Final Verdict:

Term	Use?	Reason
Laminated	✅ Yes	Correctly conveys fabrication and bonding of layers
Stacked	❌ No	Too loose; doesn’t imply integration or permanence

 

So, “a base material layer laminated on the device mounting layer” is the better choice for accurate and idiomatic technical English.