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What I don't understand is why there seem to be no "bulk processes". Saw a wafer into (tiny) pieces using a raster, somehow (yes yes...) load them onto a roller
by ahartmetz 2y ago
What I don't understand is why there seem to be no "bulk processes". Saw a wafer into (tiny) pieces using a raster, somehow (yes yes...) load them onto a roller, and place them a column at a time. Anything resembling a pixel at a time seems wildly impractical. They actually seem to be that far I guess, because the price per LED is already down to ~0.05 cents ($10k for a 4K display). Lesson: 4K is a lot of pixels ;)
- DiabloD3 2y agoWe already don't need a crude process like you describe for lighting applications: look up "chip on board" LEDs, or COBs. The brightest single element LED lights you can buy today are all COBs. What we need is finer COBs that are monitor sized, and wired like a monitor.
- mystified5016 2y agoI mean, that's more or less the conventional process for mass assembling PCBs. We use CNC machines that place down each component before the boards roll down the line to batch soldering. It would be wildly inefficient for large TV panels, and you probably couldn't get enough precision at a reasonable price. It would make much, much more sense to produce them the way we do LCD panels. The entire panel is manufactured at once with a lithographic process. Ideally, you'd grow the LEDs directly on the substrate. Then again, the process you suggest is almost what they lay out in the article. The LEDs and circuit elements are raster printed. It's still very inefficient as it takes a long time to raster over an entire panel