63results about How to "Improve first-time yield" patented technology

A novel graphite boat comprises a graphite block and a plurality of boat pieces arranged in parallel, the graphite block and the boat pieces form an included angle of 90 degrees, the graphite block is connected with the boat pieces through graphite screws, and the novel graphite boat is characterized in that a fixed interval is arranged between every two adjacent boat pieces, and the width of the fixed interval is gradually increased from the center to the two sides. According to the utility model, through the non-equal-interval design, the intervals of the outer-layer boat pieces of the graphite boat are increased, and the potential difference of the adjacent outer-layer boat pieces during discharging is reduced in the process, so that the film forming color difference caused by temperature difference is optimized, and the effect that the appearance color of the formed film is consistent is achieved; rework and damage can be effectively reduced, the one-time yield is improved, the cost is further reduced, and the production efficiency is improved.