After the three-day strike ending on Wednesday, the National Samsung Electronics Union (NSEU), the largest labor union of the world's largest memory chip maker, had planned to hold another five-day strike from July 15.

The union said it changed its plan to go straight on an indefinite strike because the company did not attempt to engage in any negotiations during the three-day strike, Yonhap news agency reported.

NSEU said more than 6,000 members have expressed their intention to take part in the labor action. It said more than 5,000 of them were from the mainstream semiconductor division.

Despite the strike, Samsung said there were no production disruptions during the first two days of the labor action.

Since January, the two sides have held several rounds of talks but have been unable to narrow their differences over salary increase rates, leave systems and bonuses.

The union is demanding a day off for all employees and a significant wage increase for the 855 members who have not signed the 2024 wage negotiation agreement.

The union also demanded that the company offer more paid leave and provide compensation for economic losses incurred during unpaid strikes.

NSEU reports a total membership of 31,000, which is about 24 percent of Samsung Electronics' total workforce of 125,000.