Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent
1987-11-12
1988-11-08
Powell, William A.
Electrical audio signal processing systems and devices
Sound effects
Reverberators
29852, 156634, 156645, 156656, 156630, 156902, 174 685, 361398, 361399, 381 687, 381 69, 427 96, H04R 2500, H05K 100, B44C 122, C23F 102
Patent
active
047838159
ABSTRACT:
As opposed to standard circuit board fabrication techniques, whereby plated holes are commonly bored through all the layers of a multilayer board, the circuit board for a hearing aid according to the invention is fabricated by alternatingly forming plated holes in subpackets of the circuit board and then joining together the subpackets until the completed multilayer board is bonded together. The circuit board can be provided with plated internal holes, plated blind holes as well as standard through holes. An especially high component density on the two surfaces of the circuit board is acheived, as well as the fabrication of extremely thin and flexible multilayer circuit boards.
REFERENCES:
patent: 3219749 (1965-11-01), Schuster et al.
patent: 3436819 (1969-04-01), Lunine
patent: 3471348 (1969-10-01), Shaheen et al.
patent: 3471631 (1969-10-01), Quintana
patent: 4037047 (1977-07-01), Taylor
patent: 4663208 (1987-05-01), Ninomiya et al.
patent: 4710419 (1987-12-01), Gregory
Powell William A.
Siemens Aktiengesellschaft
LandOfFree
Manufacturing miniature hearing aid having a multi-layer circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Manufacturing miniature hearing aid having a multi-layer circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacturing miniature hearing aid having a multi-layer circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-467275