Hesse & Knipps
BJ 935 Heavy
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
What it is
The Hesse & Knipps BJ 935 is a heavy wire bonder. The BJ 935 operates on a 230 V supply at 50-60 Hz.[1]
How it works
General reference — not yet source-verifiedWire bonders feed a wire from a spool through a bonding tool. The tool applies pressure and ultrasonic vibration to create a metallurgical connection between the wire and the bond pad. Ultrasonic bonding uses frictional heat and pressure to form the weld.
Heavy wire bonding generally uses a wedge bonding process. The wire is deformed into a wedge shape at both bond locations. Aluminum wire is commonly used for heavy wire bonding.
Where it fits in the process flow
General reference — not yet source-verifiedHeavy wire bonding is performed in the back-end assembly of semiconductor packages. The process follows die attach, in which the die is mounted onto the substrate or leadframe. After bonding, the package is encapsulated to protect the wire connections.
What do the numbers mean?
Power & electrical1
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
- Voltage230 V[1]
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
Not publicly documented
The following facts about the BJ 935 Heavy are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
Fewer than 3 independently cited specifications for the BJ 935 Heavy are on record; the remainder await public documentation.
Answerable by: an OEM datasheet, a cleanroom equipment inventory, or an engineer who operated or installed it
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the BJ 935 Heavy are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the BJ 935 Heavy are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the BJ 935 Heavy are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the BJ 935 Heavy are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (1)Every fact above is drawn from these public sources
- [1]Inventory photo
Last updated Sep 24, 2026.
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