Patent ID: 9105603
Filing Date: 2015-08-11
Classification: B82Y,C01G,C01P,C04B,H01C,H01G,H01L

Abstract:
1. A laminate type semiconductor ceramic capacitor with varistor functionality, the capacitor comprising: a laminated sintered body having a plurality of alternately stacked semiconductor ceramic layers and internal electrode layers, the semiconductor ceramic layers comprising a SrTiO external electrodes on opposed ends of the laminated sintered body, the external electrodes electrically connected to respective sets of the internal electrode layers, wherein the semiconductor ceramic has a compounding molar ratio m between the Sr site and the Ti site to satisfy 1.000≦m≦1.020, has a donor element present as a solid solution in crystal grains, has an acceptor element present in a grain boundary layer in a range of 0.5 mol or less and greater than 0 mol with respect to 100 mol of the Ti element, contains a Zr element in a range of 0.15 mol or more and 3.0 mol or less with respect to 100 mol of the Ti element, and the crystal grains are 1.5 μm or less in average grain size.