| 摘要 |
PURPOSE:To eliminate disconnection resulting from heat-caused distortion and short circuits by a method wherein the ratio of the pellet thickness against the bump electrode height is set somewhere between 2.1 and 8.1. CONSTITUTION:A pair of leads with large-diameter ends called slug leads 10 are serially arranged and a pellet 12, an Si-made circuit element, is inserted between the end surfaces of the large-diameter portions 11 of the slug leads 10. The pellet 12 and the large-diameter portions 11 are sealed airtight in a glass tube 13. A surface of the pellet 12 in contact with a large-diameter portion 11 is provided with an Ag-made hemispherical or truncated corn-shaped bump electrode 14 whereby the pellet 12 establishes contact with the other large-diameter portion 11. The relationship between the pellet thickness x and the bump electrode height (thickness) y is set so that the thickness ratio Q=x/y may be somewhere between 2.1 and 8.1, and the bump electrode height y is set at 50mum. |
