South Korean outsourced semiconductor assembly and testing (OSAT) companies saw their revenues increase by double-digits in 2021, their filings showed.
OSAT companies handle packaging and testing of processed wafers. They are seeing demand for their services increase from the ongoing global chip shortage.
SFA Semiconductor recorded 641.1 billion won in revenue and 66.5 billion won in operating income during 2021, an increase of 11.9% and 93.9%, respectively, from a year ago.
Its major customer Samsung Electronics saw expanded sales in memory chips while its subsidiary in the Philippines saw solid growth from the high overall demand for server and PC memory products.
Hana Micron recorded 666.5 billion won in revenue and 96.3 billion won in operating income last year, an increase of 24.1% and 88.9%, respectively, from 2020.
The company, like SFA, enjoyed high demand for its services from Samsung as well as SK Hynix.
Nepes also saw its revenue grow 21.8% over the same time period to 418.4 billion won, but it recorded a loss of 16.4 billion won.
The company had spent aggressively in its fan-out panel level package business, which is contributing to revenue later than expected.
LB Semicon recorded 496.2 billion won in revenue and 44.1 billion won in operating income in 2021, an increase of 12.1% and 3%, respectively, from 2020.
Tesna, meanwhile, posted 204.3 billion won in revenue and 52.5 billion won in operating income, a jump of 54.2% and 71.6%, respectively, over the same time period.