Sources: Japanese chipmaker Renesas is in talks to buy US chipmaker Maxim, in a deal that could approach $20B in value; deal not imminent; Maxim stock jumps 12% (Alex Sherman/CNBC)

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Alex Sherman / CNBC:
Sources: Japanese chipmaker Renesas is in talks to buy US chipmaker Maxim, in a deal that could approach $20B in value; deal not imminent; Maxim stock jumps 12%  —  - Consolidation in the semiconductor industry is being driven by scale efficiencies, increasing demand from car companies and the rising costs of chip fabrication.