|
|
| High reliability even with through-hole boards |
 |
 |
 |
| "ururu & Salala",the air-conditioners that use "SN100C" |
Daikin Industries, Ltd. is the world's only manufacturer of
air conditioners that undertakes the development and production of all system
component, from refrigerant to hardware. Daikin gives practical expression
to its concern for the environment by designing air-conditioners that minimize
energy consumption, adopting a new refrigerant (based on hydrofluorocarbons)
that does not harm the ozone layer, and recycling. Going lead-free
is one of the important parts of the recycling program. In October 2002, "SN100C" was
adopted in "Ururu & Salala" room air conditioners and the "ZEAS
II" packaged air conditioners. Both are flagship models of Daikin, and "SN100C" was
selected after an evaluation of all the available lead-free solders.
The Shiga plant is the development and production base of the "Ururu & Salala" model.
The Product Development Group's Chief Engineer, Mr. A said, "Driven by
the worldwide cost competition, we have chosen the lead-free solder that we can
be sure has the tensile strength, reliability, and low-cost we need. While
in terms of the papers presented at conferences and national projects, the tin-silver-copper
solder is the one that has been the subject of most research, cost is now the
issue." "And we are worried about the incidence of ion migration
given that silver easily ionizes," added Mr. B, belongs to the same group.
Daikin's outdoor air conditioning unit's printed circuit board is of a double-sided
through-hole type, but with "SN100C". "There is no fillet lift,
and copper erosion is minimal, so that we can be confident of the board’s
quality and reliability," proclaimed Mr. B. "It has also passed
the criteria in regard to thermal fatigue resistance of components exposed to
cyclical high temperature, and the solderability challenges of through-hole printed
boards. The optimal use of low-cost solder is the result of our manufacturing
development technology," said Mr. A proudly of the company's achievement.
Daikin's aim is to remove lead from all its new products by March 2003. |
|
|
![[CASE3] DAIKIN INDUSTRIES, LTD.](images/voice03_title.gif){kind=small}
