Pure-play foundry United Microelectronics (UMC) saw its January revenues hit a three-month high, while fellow company Vanguard International Semiconductor's (VIS) saw revenues decrease 4% on month.
UMC announced consolidated revenues of NT$13.18 billion (US$449.3 million) for January 2018, down 23.5% sequentially but up 4.1% on year.
UMC estimated previously the company would post a 2-4% sequential increase in wafer shipments but an approximately 2% fall in ASPs for the first quarter.
Specialty IC foundry VIS disclosed consolidated revenues for January 2018 came to NT$2.13 billion, up around 8% from a year earlier.
VIS expects to post revenues between NT$6.2 billion and US$6.4 billion in the first quarter compared with NT$6.38 billion in the fourth quarter of 2017.