{
  "id": 3076637,
  "title": "YouTuber's backyard fab ambitions expand from RAM to homebrew LEDs",
  "url": "https://urgent.news/2026/08/24/youtubers-backyard-fab-ambitions-expand-from-ram-to-homebrew-leds-3076637",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-08-24T17:22:00.000Z",
  "source": {
    "name": "The Register",
    "slug": "the-register",
    "url": "https://www.theregister.com/systems/2026/08/24/youtubers-backyard-fab-ambitions-expand-from-ram-to-homebrew-leds/5291956"
  },
  "original_language": "en",
  "account": "Dr. Semiconductor, a YouTuber with a mission to democratize semiconductor manufacturing, has successfully manufactured working LEDs in his backyard fab. Dr. Matthew Hartensveld, the engineer behind the project, first gained internet attention five months ago for building a class-100 cleanroom in his shed. He previously demonstrated his ability to build DRAM in the cleanroom, and this LED project follows that achievement with further ingenuity.\n\nHartensveld's decision to create LEDs was directly connected to his RAM ambitions. While working DRAM cells are great, they are far from functional DDR5 chips that can replace costly chips from major manufacturers. Converting DRAM cells into a RAM chip requires more fabrication and packaging work, particularly aligning tiny contacts with corresponding pads on a circuit board. GaN, a material used in LEDs that is transparent, offers an opportunity for home packaging experimentation.\n\nEtching GaN into LEDs traditionally requires hazardous chlorine gases, which Hartensveld found impractical and unsafe. Instead, he used a laser etcher with a 355 nm ultraviolet wavelength that GaN absorbs. After successful testing, he moved on to a traditional LED production flow, adding p-type and n-type contacts using photoresist, metal deposition, and indium bumps to attach the LED to an ENIG-finished circuit board. The LED's transparency allowed Hartensveld to demonstrate the bonding process and supply power, resulting in a bluish light.\n\nBy covering the LED in Cerium-doped yttrium aluminum garnet, Hartensveld was able to change the color to emit a warmer white light. His project successfully demonstrated not only the democratization of LED manufacturing but also its potential for future RAM module manufacturing. Hartensveld plans to further shrink transistors and capacitors, increase density, and experiment with techniques used in modern commercial DRAM. He intends to release open-source documentation for his entire process, hoping to inspire others to build on his work and make chip fabrication more accessible.",
  "summary": "Dr. Semiconductor's latest project lights the path toward what he tells us he hopes becomes a cottage chip industry",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 2,
    "also_reported_by": [
      {
        "outlet": "The Register Science",
        "title": "YouTuber's backyard fab ambitions expand from RAM to homebrew LEDs",
        "url": "https://urgent.news/2026/08/24/youtubers-backyard-fab-ambitions-expand-from-ram-to-homebrew-leds",
        "published": "2026-08-24T17:22:00.000Z"
      }
    ]
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}