A new and distinct cultivar of Dahlia plant named \u2018Bkdars\u2019, characterized by its compact, upright, somewhat outwardly spreading and mounding plant habit; dense and bushy growth habit; early and continuous flowering habit; double inflorescences with light purple-colored ray florets; and good garden performance. A redundant memory cell array shares the bit lines with the memory cell array and includes plural redundant memory cells arranged at intersections of the bit lines and redundant word lines storing redundant data for error correction of cell data stored in the memory cell array. The selective etch process utilizes a main etch where the resist etch selectivity is higher than in the overetch step in which the etch is more selective to removal of the resist layer relative to the chrome layer.