EP 1080253 A2 20010307 - CHEMICAL MIXING, REPLENISHMENT, AND WASTE MANAGEMENT SYSTEM
Title (en)
CHEMICAL MIXING, REPLENISHMENT, AND WASTE MANAGEMENT SYSTEM
Title (de)
CHEMISCHES MISCH-, NACHFÜLL- UND ABFALLMANAGEMENTSYSTEM
Title (fr)
MELANGE CHIMIQUE, REGENERATION ET SYSTEME DE TRAITEMENT DES DECHETS
Publication
Application
Priority
- US 9909541 W 19990430
- US 8381198 P 19980501
Abstract (en)
[origin: WO9957340A2] A chemical control system for controlling the chemistry of a chemical solution having predetermined chemical constituents in a plating system, such as a NiFe plating system, employs a mix container for containing a plating solution and a hold container for containing a plating solution delivered from the mix container. A precision delivery arrangement delivers a precise predetermined quantum of a predetermined constituent of the plating solution to multiple mix containers and the hold containers. Transfer of plating solution between the mix and hold containers is effected by a transfer pump. Nitrogen gas that has been humidified with deionized water protects the plating solution from either acquiring water or becoming dehydrated, the humidified nitrogen gas being humidified to a predetermined relative humidity with respect to the temperature of the plating solution in the mix container. This is achieved by urging the nitrogen gas through a column that is at the same temperature as the plating solution. Precise delivery of the chemical constituents is achieved by a pneumatic pump arranged serially with an orifice and an inexpensive flow meter. The pneumatic pump is a positive displacement, double diaphragm pump.
IPC 1-7
IPC 8 full level
C25D 21/14 (2006.01); C25D 21/18 (2006.01)
CPC (source: EP KR)
C25D 21/12 (2013.01 - KR); C25D 21/14 (2013.01 - EP)
Citation (search report)
See references of WO 9957340A2
Designated contracting state (EPC)
BE DE GB NL
DOCDB simple family (publication)
WO 9957340 A2 19991111; WO 9957340 A3 20000203; AU 3778999 A 19991123; EP 1080253 A2 20010307; JP 2002513861 A 20020514; KR 20010052287 A 20010625
DOCDB simple family (application)
US 9909541 W 19990430; AU 3778999 A 19990430; EP 99920246 A 19990430; JP 2000547288 A 19990430; KR 20007012130 A 20001031