Following a series of gas leaks that killed and injured workers, the world’s second largest maker of DRAM computer chips says it will beef up safety at its facilities.

News sources report that in the latest incident involving the South Korean company, SK hynix, three contract workers died in April from a gas leak at a construction site of the firm’s new chip production line in Icheon.

Fifteen workers were injured in two other gas leaks at the Icheon plant in March and July of last year.

Investing in safety

Responding to criticism, SK hynix said it would invest $108 million dollars to enhance safety at its facilities this year, with increases planned for 2016 and 2017.

A spokesman for the company said it would continue to boost safety at the plants and set up a master plan that includes deploying skilled safety managers.

DRAM stands for Dynamic random-access memory.