Skip to content
Substrata
Join

Conversion · Japan

Sumitomo Electric

5802 JPSMTOY US Work there, own it, buy from it ↓

Convert — holds How this is computedCount of bottlenecks on which this organisation is recorded as a producer, a holder of the capacity, or a supplier of a critical part.Method →Code → of the How this is computedCount of rows in the bottleneck corpus: every material plus every non-material chokepoint.Method →Code → bottlenecks tracked here.

Bottlenecks held1 (Computed: Count of bottlenecks on which this organisation is recorded as a producer, a holder of the capacity, or a supplier of a critical part.) of 33each with another maker recordedHardest binding5 (Estimate by Substrata, 2026-09-15: concentration 2 + substitution 1 + lead time 1 + inelasticity 1 = 5 of 12)/12CVD synthetic diamond heat spreader · judged 2026-09-15

Role cited from sumitomoelectric.com ↗. Report an error

Searching is free and needs no AI. Summaries use your own AI model.

01Chokepoints it holds

1 of 1 sourced
  • CVD synthetic diamond heat spreader

    Convert · Beyond two years

    Other makers: Element Six GB IE, Coherent US, Diamond Materials DE, Applied Diamond US

    Sourced: sumitomoelectric.com ↗

    Estimate, not a measurementconcentration 2 + substitution 1 + lead time 1 + inelasticity 1 = 5 of 12. Several growers, and copper or SiC do the job for most parts today. Binds only if diamond becomes the standard spreader for high-power dies.By Substrata · 2026-09-15Supporting source →/122+1+1+1

Score = concentration + substitution + lead time + inelasticity, each 0–3, an analyst judgement dated 2026-09-15; open a score for its rationale and assessment. Makers are those the corpus records, not the whole market. No market-share figure is sourced, so none is shown.

02Unread leads

6 found by the sweep, unread

Pages the sweep found on these chokepoints. Nobody here has read them yet; they are not events and not evidence.

03What could loosen its grip

about its chokepoints, not the company
  • Diamond heat spreaders in production packaging

    Putting a layer of laboratory-grown diamond next to the hottest part of a chip, because nothing else moves heat as fast.

    Science · for CVD synthetic diamond heat spreader

    readiness
    Estimate, not a measurementWorks in a realistic setting. Used in specialist radio-frequency and laser parts; not standard in high-volume logic packaging.By Substrata · 2026-09-15Supporting source →/9

Readiness is the 1–9 technology-readiness scale, a dated judgement; open a figure for the reasoning and its source.

04Others at the same step of the chain

directory rows · grades are judgements

05Ways to take part

how to reach it, not whether to

Not investment advice. This says how the public can reach a company — a job, its shares, its products — not whether anyone should. It takes no account of anyone’s circumstances, and a company holding a chokepoint is not a reason to own it. What this is not

Work there
It publishes its roles on its own careers page.Official careers page ↗
Own part of it
Its shares trade publicly as 5802 JP and SMTOY US, bought and sold through a broker that reaches that exchange.5802 JP listing record ↗SMTOY US listing record ↗
Buy from it
At this depth of the chain most sales are to other businesses, under contract. No page of its own is recorded here yet.

06Hiring

official careers page

Its roles are published on its own site, which Substrata links rather than reads. Official careers page ↗

07What this holds up

2 loops

A loop is one design, build and measure turn. Severity is a dated judgement on a 0–12 scale, not a measurement, and the judgements are not added together — the figure shown is the worst single one.

08Sources

1 cited
  1. sumitomoelectric.com ↗ — CVD synthetic diamond heat spreader: convert

Discussion

Comments use threadkit (permission is participation). Sign in with OrangeCat to write. Fact-check is the same assistant as Ask, grounded in the corpus.

  • No comments yet.

Need an account? Sign in.