AMALENDU SANYAL
Broker in Andover, MA
License number
Massachusetts 86330
Issued Date
Jul 1, 1986
Expiration Date
May 15, 1989
Type
Salesperson
Address
Address
Andover, MA 01810
Personal information
See more information about AMALENDU SANYAL at radaris.comName
Address
Phone
116 Greenwood Rd, Andover, MA 01810
116 Greenwood Rd, Andover, MA 01810
115 Greenwood Rd, Andover, MA 01810
Professional information
Method Of And Apparatus For Surface Mounting Electronic Components Onto A Printed Wiring Board
US Patent:
4872261, Oct 10, 1989
Filed:
Dec 11, 1987
Appl. No.:
7/131652
Inventors:
Amalendu Sanyal - Andover MA
Peter Moy - Atkinson NH
Frank Cosentino - Wakefield MA
Peter Moy - Atkinson NH
Frank Cosentino - Wakefield MA
Assignee:
Digital Equipment Corporation - Maynard MA
International Classification:
H05K 334
US Classification:
29840
Abstract:
A means for applying solder paste to surface contact pads on a printed wiring board with a stepped solder stencil is disclosed. The stepped stencil has sections of different thickness. Each stencil section has stencil openings formed therein through which solder is deposited onto the surface contact pads. The individual stencil openings are positioned so paste may be deposited through them on surface contact pads in registration underneath. The stencil sections have different thicknesses so solder can be deposited through all stencil openings of verying size with uniform results. Generally, the smaller sized stencil openings are formed in the thinner stencil sections. When this solder stencil is used it is possible to apply all the solder needed, to bond both standard component leads and fine pitch components in a single pass. Multiple solder applications and multiple vapor phase curing associated with surface mounting techniques, are eliminated.