Bow Bells
Bow Bells , in the church of St. Mary-le-Bow (Bow Church), Cheapside, London, England. The church is located in mid-London, and tradition says that only one who is born within sound of the Bow Bells is a true Londoner, or Cockney. According to legend the Bow Bells called Dick Whittington (see Whittington, Richard ) back to London. The fine steeple, which is over 222 ft (68 m) high, was constructed by Christopher Wren when he rebuilt the church after the great fire of 1666; the crypt of the original Norman church, with the arches (bows) for which the church is named, still stands.
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Solders strengthened with copper arid silver particles. (Tech Spotlight).
Magazine article from: Advanced Materials & Processes; 12/1/2002; ; 700+ words
; ...mechanical properties of solders and solder joints, two techniques have...motion so as to strengthen the solder against creep and fatigue deformation. Composite solder research Certain composite solders have exhibited enhanced strength...
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All solder pastes are not created equal: several in-house tests will reveal if you are using the right solder paste for your application.(Materials)
Magazine article from: Circuits Assembly; 9/1/2002; ; 700+ words
; ...engineer will work with is solder paste. Interestingly...accommodate good contact. Solder Wetting The typical wetting test is to print the solder paste onto a substrate of...Of course, no one really solders to bare copper, so this...
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Solder Paste vs. Flux-only Attachment for BGA Rework
Magazine article from: SMT; 1/1/2005; ; 700+ words
; ...reworked should be placed and reflowed using solder paste, and the board/device should...zone reflow ovens. In addition, the solder paste printing process should be uniform...Application Methods There are numerous practical solder paste application methods for reworking...
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Solder ball attachment using laser soldering: used to reball parts, the process eliminates two thermal cycles and enhances component reliability.(Cover story)
Magazine article from: Circuits Assembly; 10/1/2008; ; 700+ words
; Solder ball attachment to BGA and CSPs is seldom...negative impact on component reliability. Most solder ball attachment processes in use are convection...heating the entire component to achieve good solder sphere wetting to the BGA pads during original...
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Solder preforms in Circuits Assembly: new solutions for old problems.(Materials)
Magazine article from: Circuits Assembly; 4/1/2004; ; 700+ words
; ...technology has become synonymous with the use of solder paste. Paste was developed to provide a high...circuit board (PCB) assemblies. However, solder paste has limitations when used to solder through-hole components. Overprinting paste...
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Solders strengthened with nickel particles.(Tech Spotlight)
Magazine article from: Advanced Materials & Processes; 8/1/2004; ; 700+ words
; ...reinforcement particles to solders provides a viable means for...lead-free eutectic composite solders based on Sn-3.5Ag. The...particle reinforced composite solder joints. It was shown that...of the eutectic Sn-3.5Ag solder joint was significantly improved...
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Solder practice always in flux
Newspaper article from: Chicago Sun-Times; 4/16/1989; 700+ words
; ...joined and of course the solder - the "glue" that...joint together. Most solders are mixtures of tin and lead. A solder of 60 percent tin and...are high-temperature solders that do not contain lead. Silver solder is an alloy of silver...
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Solder and flux this familiar pairing has seen some changes over the years.(techtopic)(Interview)
Magazine article from: Reeves Journal; 5/1/2008; ; 700+ words
; ...difficult at first because leaded solder melts at a lot lower temperature than lead free solder. Lead-free is usually...are a lot of lead-free solders out there but the thing the...heat to melt the lead free solder than the leaded solder...
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Electromigration in solder joints and solder lines
Magazine article from: JOM; 6/1/2002; ; 700+ words
; ...Summary Lead-Free Solders Electromigration may...reliability of flip-chip solder joints. Eutectic solder...divergence planes for solder bumps, since atoms in solders diffuse much faster...electromigration behavior in solder bumps differs from...
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Solder mask: beauty beyond skin deep.(SupplierSpotlight)
Magazine article from: CircuiTree; 5/1/2005; ; 700+ words
; In the past ten years, solder mask's role in the performance and appearance...part of the board: laminate, copper, solder mask/legend ink, and the final metal finish. One could say that solder mask has turned into a "beauty contest...
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solder
Book article from: The Columbia Encyclopedia, Sixth Edition
solder , metal alloy used...binder. The type of solder to be used is determined...to be united. Soft solders are commonly composed...i.e., silver solders) have high melting...from separating the solder from the surface...
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Tiara
Book article from: How Products Are Made
...and tightly wrapped. Precious metal solder will not stick to the iron so the binding wire can be removed. Solder is metal or a metal alloy that is melted...pieces of metal. In tiara manufacture, solder of the same precious metal as the wire...
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Lead Poisoning
Book article from: Nutrition and Well-Being A to Z
...water, houses, ceramic cookware, and solder used in metal cans and pipes. Lead poisoning...the presence of pipes soldered with lead solder. Lead can leach into the water in the...gasoline, lead-based cosmetics, lead solder in food containers, ceramic cookware...
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Printed Circuit Board
Book article from: How Products Are Made
...each component contact the printed circuits directly. A solder paste consisting of glue, flux, and solder are applied at the point of contact to hold the components in place until the solder is melted, or "reflowed," in an oven to make the...
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Mueller Industries, Inc.
Book article from: International Directory of Company Histories
...1930 when the company introduced the revolutionary Streamline solder-type fitting. Previously, fittings — which joined...had been the weakest sections of pipes. However, the new solder-joined fittings were actually stronger than the tubes they...
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