There is no Chinese DDR5 DRAM as of now. SME required for it was sanctioned. We will have to wait a bit more.
Chinese semiconductor industry
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There is no Chinese DDR5 DRAM as of now. SME required for it was sanctioned. We will have to wait a bit more.
No HBM either，could be problem for AI application
Changxin Storage Technology Co., Ltd.'s patent for "memory failure testing method and device, storage media and electronic equipment" was published. The application publication date is September 12, and the application publication number is CN116741253A. The patent abstract shows that the present disclosure relates to a memory failure testing method, a memory failure testing device, a computer-readable storage medium and electronic equipment, and relates to the field of integrated circuit technology.
This is a little "unreal" or surreal to me. 20M Kirin 9000s (in 12 months?), in my book, would indicated that the "game" is royally over. A commercially viable 7nm capability with no strings attached would satisfy all practical needs from high-tech to deep-tech for years to come, except for some yippie fancy show-off mobile handsets. From that point on, only tangible benefits of "sanctions" would be top-end handset segment for AAPL and QCOM. But the costs would be long-term health of US semiconductor vendors. No wonder US admin has been uncharacteristically quiet on this event, notwithstanding some noises from capital hill. Certainly I did not expect a passing-grade 7nm at this juncture.
ummm?
I saw the patent on Twitter as well. Don't have any idea if it would actually work, but it would be absolutely wild if it can be verified and have a useable process developed around it.
Ain’t going to work for advanced front end applications and it most likely won’t be cost effective.
It would be like going back the era of contact lithography but I don't know all the details and what workarounds they are making.
In other news I find interesting that china have mask writers for advanced process nodes.
The key to this technology is achieving SAW level cost for BAW level performance. Just 10-20% of BAW filter cost is needed here
And the frequency range has increased to include 6-10GHz.
Which to me seems like where 6G or even 5.5G frequencies will end up
so the band they opened up for greater 5G (likely 5.5G) is in this range of 6.4 to 7.1GH which is currently not supported by any of the BAW filters
here are the current bands (you can see in this link)
Qualcomm supports filters from 5 to 7GHz
looks like Akoustis tech supports up to 7GHz also
so current tech is not ready to handle the upper end of the band that China has recently auctioned off.
Back to our diamond friend
Their 3 stage plan involves first getting diamond based BAW filter into mass production
2nd builds diamond & AlN wafer production line
3rd will involve becoming an IDM
so there is an issue of material and patents that has kept China's BAW filter production down.
In this case, CAS and 科之诚公司 worked on this for 8 years to create this diamond based RF filter
科之诚 did well enough that it got Henan govt official to visit this month.
Looks like aside from 2-10GHz diamond rf filter, they also got this newly designed spiral structure IDT transducer circuit
looks like it just got A+ round funding
Alright, my moderator comments does not seem to be getting through. rui009 doesn't seem to understanding the meaning of staying low for a while here and reading contents. Others don't seem to be understanding the meaning of ignoring him.
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