Flux and method for producing assembly
AssigneeSenju Metal Industry Co., Ltd.
InventorsYasuhisa Sukawa, Hiroyuki Yamasaki, Haruya Sakuma, Masato Shiratori
Life of this patent
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Abstract
A flux containing a rosin (P), a compound (SA), an activator (provided that a compound corresponding to the compound (SA) is excluded), and a solvent (provided that a compound corresponding to the compound (SA) is excluded) is adopted. The compound (SA) is a compound represented by General Formula (sa). In Formula (sa), R11 represents a hydrocarbon group which may have a hydroxy group; R12 and R13 each independently represent a hydrocarbon group having 5 or less carbon atoms, which may have a substituent, a hydroxy group, or a hydrogen atom; and m represents a positive integer.
Claims15
A flux comprising:
- a rosin (P);
- a compound (SA) represented by General Formula (sa);
- an activator, wherein the activator does not include a compound represented by the General Formula (sa);
- and
- a solvent, wherein the solvent does not include a compound represented by the General Formula (sa),
- wherein the rosin (P) includes a rosin (PA) having a softening point of higher than 100° C. and a rosin (PB) having a softening point of 100° C. or lower;
- a mixing ratio of the rosin (PA) and the rosin (PB) in terms of a mass ratio represented by (PA)/(PB) is (PA)/(PB)=5/5 to 9/1;
- a content of the compound (SA) is 0.1% by mass or more and 6% by mass or less with respect to the total mass (100% by mass) of the flux, and
- a content of the solvent is 60% by mass or more and 95% by mass or less with respect to the total mass (100% by mass) of the flux,
- in General Formula (sa), R11 represents a hydrocarbon group which may have a hydroxy group, R12 and R13 each independently represent a hydrocarbon group having 5 or less carbon atoms, which may have a substituent, a hydroxy group, or a hydrogen atom, and m represents a positive integer.
Dependencies are inferred from the claim text.