EP0307888A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Solder precipitating composition and method of precipitating solder
Assignee: Furukawa Electric Co Ltd
•
Filing: 1988-09-14
•
Granted: —
•
Expires: 2008-09-14
Abstract
Abstract A solder precipitating composition comprises a powder of a metal having the highest ionization level among metals constituting a solder alloy to be prepared, and a salt between a carboxylic acid and a remaining metal of the solder alloy. The composition (7) is applied to a surface (1) on which the solder (8) is to be precipitated, and the solder (8) is precipitated, thereby performing soldering.
Inventors
- 👤 Takao Fukunaga
- 👤 Hisao Nakajima
- 👤 Kenzo Kobayashi
- 👤 Masanao Kono
- 👤 Hisao Irie
- 👤 Ryo Inoue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 05:35
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/34; B23K35/24; B23K35/26; B23K35/262; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3465; H05K3/3485; H05K2203/00; H05K2203/12; H05K2203/125
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
41 words
A solder precipitating composition comprising: a powder of a metal having the highest ionization level among metals constituting a solder alloy to be prepared; and a salt between a carboxylic acid and one or more remaining metals of the solder alloy.
Claim 2
Dependent Claim
41 words
A solder precipitating composition comprising: a powder of a metal having the highest ionization level among metals constituting a solder alloy to be prepared; and a salt between a carboxylic acid and one or more remaining metals of the solder alloy.
Claim 3
Dependent Claim
27 words
A composition according to claim 1, further comprising a solvent and a viscosity stabilizer which are mixed with said powder and said salt to prepare a paste.
Claim 4
Dependent Claim
34 words
A composition according to claim 1, further comprising a viscosity stabilizer, and wherein said salt has a liquid phase, and said powder, said salt, and said viscosity stabilizer are mixed to prepare a paste.
Claim 5
Dependent Claim
80 words
A composition according to claim 1, characterized in that ratio of weight Wp of the powder of metal P to weight Ws of metal S contained the salt, i.e., Wp/Ws, is equal to or smaller than: Ap/As + Mp/Ms where, As: parts by weight of metal S of the solder alloy to be prepared, Ap: parts by weight of metal P of the solder alloy to be prepared, Ms: atomic weight of metal S Mp: atomic weight of metal P
Claim 6
Dependent Claim
12 words
A composition according to claim 1, further comprising a sag preventing agent.
Claim 7
Dependent Claim
15 words
A composition according to claim 5, characterized in that the sag preventing agent contains cellulose.
Claim 8
Dependent Claim
52 words
A solder precipitating composition comprising: a powder of a metal other than metals constituting a solder alloy to be prepared; and a carboxylate of at least two metals having lower ionization levels than the metal constituting the powder, said at least two metals being included in the metals constituting the solder alloy.
Claim 9
Dependent Claim
52 words
A solder precipitating composition comprising: a powder of a metal other than metals constituting a solder alloy to be prepared; and a carboxylate of at least two metals having lower ionization levels than the metal constituting the powder, said at least two metals being included in the metals constituting the solder alloy.
Claim 10
Independent Claim
79 words
A method of precipitating a solder, comprising the steps of: preparing a solder precipitating composition comprising a powder of a metal having the highest ionization level among metals constituting a solder alloy to be prepared, and a salt between a carboxylic acid and one or more remaining metals of said solder alloy; applying said composition to a surface on which the solder is to be precipitated; and heating the composition after the composition has been applied to said surface.
Claim 11
Independent Claim
79 words
A method of precipitating a solder, comprising the steps of: preparing a solder precipitating composition comprising a powder of a metal having the highest ionization level among metals constituting a solder alloy to be prepared, and a salt between a carboxylic acid and one or more remaining metals of said solder alloy; applying said composition to a surface on which the solder is to be precipitated; and heating the composition after the composition has been applied to said surface.
Claim 12
Dependent Claim
16 words
A method according to claim 8, characterized in that soldering is performed by precipitating the solder.
Claim 13
Dependent Claim
33 words
A method according to claim 8, characterized in that the composition further comprises of a solvent and a viscosity stabilizer which are mixed with said powder and said salt to prepare a paste.
Claim 14
Dependent Claim
39 words
A method according to claim 8, characterized in that the composition further comprises a viscosity stabilizer, and wherein said salt has a liquid phase, and said powder, said salt, and said viscosity stabilizer are mixed to prepare a paste.
Claim 15
Independent Claim
88 words
A method of precipitating a solder, comprising the steps of: preparing a solder precipitating composition comprising a powder of a metal other than metals constituting a solder alloy to be prepared, a carboxylate of at least two metals having lower ionization levels than said metal constituting the powder, said at least two metals being included in said metals constituting the solder alloy; applying the composition to a surface whereon the solder is to be precipitated; and heating the composition after the composition has been applied to said surface.
Claim 16
Independent Claim
88 words
A method of precipitating a solder, comprising the steps of: preparing a solder precipitating composition comprising a powder of a metal other than metals constituting a solder alloy to be prepared, a carboxylate of at least two metals having lower ionization levels than said metal constituting the powder, said at least two metals being included in said metals constituting the solder alloy; applying the composition to a surface whereon the solder is to be precipitated; and heating the composition after the composition has been applied to said surface.
Claim 17
Dependent Claim
17 words
A method according to claim 12, characterized in that soldering is performed by precipitation of the solder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.