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Method for an in-line flux reservoir feed system for a flux dispenser

IP.com Disclosure Number: IPCOM000012194D
Publication Date: 2003-Apr-16
Document File: 4 page(s) / 85K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for an in-line flux reservoir feed system for a flux dispenser. Benefits include improved throughput and improved safety.

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Method for an in-line flux reservoir feed system for a flux dispenser

Disclosed is a method for an in-line flux reservoir feed system for a flux dispenser. Benefits include improved throughput and improved safety.

Background

� � � � � The conventional flux dispenser poses several problems, including:

•        � � � � Safety: System is not leakproof and requires operator intervention every 1000 units (small die).

•        � � � � Quality: System has no low-level or low-fluid alarm to notify operator when no flux is being sprayed.

•        � � � � Utilization: System is not applicable for high-volume manufacturing because the 10‑cc flux-filled syringe can only be used for 1000 units (based on a small die, .5 x .5).

•        � � � � Cost effectiveness: Flux is purchased in prefilled 10-cc syringes and not bulk containers.

� � � � � The conventional process utilizes a 10-cc syringe that is prefilled with flux and manually installed directly to the valve with each build or when the syringe becomes empty (see Figure 1). Each 10-cc syringe is sufficient to run approximately 1000 units (small die).

� � � � � One .5-liter container holds enough flux to run approximately 45,000 to 50,000 units.

General description

        � � � � � The disclosed method is an in-line flux reservoir feed system for a flux dispenser. Liquid flux is dispensed from a 500-ml airtight container directly to a flux-dispense jet valve. Low level or low fluid sensors issue an alarm and notify the operator when the level of flux in the system is low. A 10-cc syringe is used for cleaning the valve with isopropyl alcohol and for testing new batches or types of flux in low volumes.

        � � � � � The key elements of the method include:

•        � � � � Off the shelf, self contained, low cost technology

•        � � � � Utilizes the 500-ml bottles of flux supplied by vendor, requiring no pouring of liquids

•        � � � � Low level or low fluid alarm system to eliminate the opportunity of a misprocess for no flux See Fig 2

•        � � � � Ease of accessibility

•        � � � � Improved tool and link utilization

•        � � � � Position sensor for the 3-way stopcock where the feedline attaches to the flux valve

•        � � � � Alarm that is issued if the stopcock is not in the correct position when the tool is put into run-production mode

Advantages

        � � � � � The disclosed method provides advantages, including:

•        � � � � Improved throughput due to better tool\link utilization, enabling increased capacity

•        � � � � Improved throughput due to eliminating th...