Browse Prior Art Database

A Submerged Nozzle Block for Agitation of Flex Tape in Electrolytic Plating

IP.com Disclosure Number: IPCOM000016803D
Publication Date: 2003-Jul-16
Document File: 2 page(s) / 66K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that uses a submerged nozzle spray block to agitate the plating solution in electrolytic plating baths for reel-to-reel flex tape processing. Benefits include an increase in the agitation of electrolytic deposition.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 69% of the total text.

 

A Submerged Nozzle Block for Agitation of Flex Tape in Electrolytic Plating

Disclosed is a method that uses a submerged nozzle spray block to agitate the plating solution in electrolytic plating baths for reel-to-reel flex tape processing. Benefits include an increase in the agitation of electrolytic deposition.

 

Background

Current agitation for the flex tape process is a submerged nozzle block with small holes that direct fluid to the tape surface; there is no mechanical agitation used in flex tape (see Figure 1). Standard mechanical agitation methods will not work with the flex tape process, due to the flexibility of the tape as well as geometrical considerations associated with processing flex tape in the reel-to-reel format. Also, with the addition of a CZ microetch, the roughened surface causes plating defects due to entrapped air bubbles in solder mask openings.

General Description

The disclosed method’s nozzle block is located near the entry point to the electrolytic plating bath. The block has two components in its design.

 

  • The first nozzle openings provide turbulent flow parallel to the tape surface. The interaction between the edge of the tape and the fluid flow provides vibration in the tape. This flow also provides a pressure differential near the tape surface due to the Bernoulli principle.
  • The second set of nozzles provides a fluid flow at an incident angle to the surface of the flex tape to remove any trapped air bubbles in the PSR openings.

The angled nozzl...