"22nm requires 44nm photolithography HP CD. This requirement is difficult to achieve in actual processes, as it is too close to the 38nm limit."
"Therefore, Intel was the first to use double patterning technology. This technology breaks down very close lithographic patterns on the same layer onto two masks, which are then exposed in two separate exposures."
"Similarly, self-aligned technology has also been introduced, making triple and quadruple exposures possible."
Cheng Gang listened with a face full of question marks, and was shocked by Young's profound expertise in the semiconductor field.
At fifty years old, he has a knack for cutting-edge technology. Anyone who can become a partner at IDG is truly a formidable individual.
He didn't interrupt Young because he was also interested in that.
"Therefore, in terms of lithography technology, resolution is not a major issue, especially in self-aligned lithography. Deposition deposition can achieve very good precision control, especially ALD, which can achieve precise atom-on-atom control."
"Since the lithography pattern needs to be broken down into multiple masks, the chip pattern cannot be drawn arbitrarily by the chip IC designer; it must follow the rules of lithography."
"HiSilicon has departments in Shanghai and Shenzhen. None of them are in Taiwan."
"The rules governing this photolithography pattern are undoubtedly top secrets of chip foundries. TSMC would never disclose them to its customers. HiSilicon can only outsource the logic design to TSMC, which then optimizes the manufacturing process."
"HiSilicon's original design couldn't take these lithography rules into account. This is why the industry has always believed that Intel and Samsung have an advantage in long-term competition."
Samsung introduced three- or even four-exposure (self-aligned) technology into NAND flash production very early on.
"Therefore, when TSMC was still at 22nm, Samsung began to advertise that we already had 14nm or even 10nm technology. It was around 2013."
"Samsung and TSMC are competitors in chip manufacturing. Of course, TSMC can't afford to lose in terms of rhetoric. It quietly relaxed the definition of node CD and also boasted that its technology had been upgraded from 22nm to 14nm."
"This exaggeration continues to this day. In reality, Samsung and TSMC's 7nm is only slightly better than Intel's 14nm, and the difference is limited."
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