Block says it has finished the development of its own 3nm bitcoin mining chip and is working through the design with a “leading global semiconductor foundry” (MacKenzie Sigalos/CNBC)

MacKenzie Sigalos / CNBC:
Block says it has finished the development of its own 3nm bitcoin mining chip and is working through the design with a “leading global semiconductor foundry”  —  Block Inc logo is seen displayed in this illustration taken, April 10, 2023.  —  Jack Dorsey says that his payments company …