The global semiconductor materials market grew 4.9% in 2020 to $55.3 billion in revenue, surpassing the previous market high of $52.9 billion set in 2018, SEMI reported in its Materials Market Data Subscription (MMDS).    Wafer fabrication materials and packaging materials revenues totaled $34.9 billion and $20.4 billion, respectively, in 2020 for year-over-year increases of 6.5% and 2.3%, SEMI reported.   The photoresist and photoresist ancillaries, wet chemicals, and CMP segments accou...