aid: sjsemi
name: SJSemi
description: 'SJSemi (SJSemiconductor (Jiangyin) Corp.) is a Chinese semiconductor
  Middle-End-Of-Line (MEOL) pure-play foundry and outsourced assembly and test (OSAT)
  provider, founded in 2014 as a joint venture between JCET and SMIC and headquartered
  in the Jiangyin High-Tech Industrial Development Zone, Jiangsu, with offices in
  Shanghai and Santa Clara, California. The company operates a 12-inch wafer bumping,
  wafer-level chip-scale packaging, chip probing and final-test line, and supplies
  advanced packaging and 3D multi-die integration services — Cu pillar, RDL, fan-out,
  TSV and silicon interposer 2.5D — into smartphone, 5G communications, high-performance
  computing, data-center and automotive electronics supply chains. It is a contract
  manufacturer of physical semiconductor packaging services and publishes no public
  developer program, API, or machine-readable interface contract.'
url: https://raw.githubusercontent.com/api-evangelist/sjsemi/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
specificationVersion: '0.20'
created: '2026-08-28'
modified: '2026-08-28'
tags:
- Company
- Semiconductors
- Hardware
- Manufacturing
- Advanced Packaging
- Wafer Test
- OSAT
- China
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/sjsemi-domain-security.yml
- type: Website
  url: https://en.sjsemi.com/
- type: News
  url: https://en.sjsemi.com/about/23368/
- type: LLMsTxt
  url: llms/sjsemi-llms.txt
x-enrichment:
  date: '2026-08-28'
  status: minimal
  artifacts_added: 3
  pass: local-v1
x-coverage:
  state: none
  reason: not-a-software-company
  detail: >-
    SJSemi is a contract semiconductor manufacturer — a 12-inch MEOL bumping, wafer-test
    and advanced-packaging foundry — whose corporate site carries only HOME / ABOUT US /
    SERVICE / SCM / JOIN US / CONTACT US, with no developer, API, or customer-portal
    section anywhere on it, and whose hosts return 404 for /openapi.json, every
    /.well-known/ path, robots.txt and sitemap.xml.
  evidence:
    - url: https://en.sjsemi.com/
      status: 200
    - url: https://en.sjsemi.com/openapi.json
      status: 404
    - url: https://en.sjsemi.com/.well-known/agent-card.json
      status: 404
    - url: https://en.sjsemi.com/.well-known/api-catalog
      status: 404
    - url: https://www.sjsemi.com/robots.txt
      status: 404
  checked: '2026-08-28'