Unionized workers at Samsung Electronics have announced plans to hold their first-ever strike on June 7, following unsuccessful wage negotiations with management. The Nationwide Samsung Electronics Union, representing around 28,000 members, expressed dissatisfaction with the management's treatment of workers and declared the strike as a response to what they perceive as labor and union repression. The union is demanding a 6.5 percent pay raise and a bonus linked to the company's earnings, but the two sides have been unable to bridge the gap in their negotiations. The decision to strike was supported by 74 percent of the union members in a vote, signaling their frustration with the management's apparent reluctance to engage in meaningful negotiations. Despite the ongoing internal disputes, the union is preparing for a one-day strike on June 7, with the potential for further protest measures. As a result of the strike announcement, Samsung's shares dropped more than 3 percent on the stock market, reflecting the potential impact of the labor dispute on the company's performance. Note: The above paraphrase captures the main points of the original article while condensing the content into two paragraphs.