A semiconductor device includes a semiconductor mesa having source zones separated from each other along a longitudinal axis of the semiconductor mesa and at least one body zone forming first pn junctions with the source zones and a second pn junction with a drift zone. Scored creases are formed in the tabs for separating the elongate tubular elements from the assembly and scored creases are formed in the carrier for defining carrier strips. At least the outer portions of the flanges desirably project toward the base sheet. These liquid compositions are prepared by new methods that provide and preserve a stable amorphous character in the dry powdered product salts.