United States Patent [19] [11] Patent Number: 4,571,662
Conquest et al. [45] Date of Patent: Feb. 18, 1986
[54] LEADLESS CAPACITORS
[75] Inventors: Alexander R. Conquest, Epping Green; Christopher F. Powling,
Paignton, both of England
[73] Assignee: Standard Telephones and Cables pic, London, England
[21] Appl. No.: 618,750
[22] Filed: Jun. 8, 1984
[30] Foreign Application Priority Data
Jun. 17, 1983 [GB] United Kingdom 8316554
[51] Int. CI.4 H01G 9/00; H01G 1/14;
H01G 7/00
[52] U.S. CI 361/306; 29/25.42;
361/433
[58] Field of Search 357/69, 72, 74;
361/433, 306, 307, 308, 310; 29/25.42
[56] References Cited
U.S. PATENT DOCUMENTS
3,550,228 12/1970 Asscher 361/306 X
3,588,628 6/1971 Peck 317/238
3,997,821 12/1976 Sternbeck 361/433
4,158,218 6/1979 McLaurin et al 361/306 X
4,247,883 1/1981 Thompson et al 361/306 X
4,417,298 11/1983 Nakata et al 357/72 X
4,497,105 2/1985 Uemura 29/25.42 X
4,510,554 4/1985 Irikura 361/433
FOREIGN PATENT DOCUMENTS
WO82/02978 9/1982 PCT Int'l Appl. . 1212899 11/1970 United Kingdom . 1309411 3/1973 United Kingdom .
Primary Examiner—Donald A. Griffin
Attorney, Agent, or Firm—Kerkam, Stowell, Kondracki
& Clarke
[57] ABSTRACT
Lead-less tantalum capacitors are made using a lead frame (1) formed to provide connection terminals (3,4) separated by an H-shaped aperture (7) and a bent-up anode support station (5). A two-part mould (13,13a) is used to injection mould plastics around the capacitor bodies prior to detaching the capacitors from the lead frame by severing necks (15,16,17,18).
A second embodiment has flat connection terminals which are bent around the encapsulated body.
6 Claims, 24 Drawing Figures
