Hesse & Knipps
BJ 820
What it is
How it works
General reference — not yet source-verifiedHeavy wire bonders such as the BJ 820 use ultrasonic energy to weld thick aluminum or copper wire to bond pads and substrate metallization.
Bonding parameters such as ultrasonic power, time, and force are programmable and can be stored in parameter libraries.
Where it fits in the process flow
General reference — not yet source-verifiedThe BJ 820 is used in semiconductor back-end assembly after die attach and before encapsulation.
Applications
General reference — not yet source-verifiedTypical packages include discrete power packages, hybrid modules, and large-area power substrates that require high-current carrying capability.
Why won't it start?
Documented failure modes, common issues, and field considerations.
- Condition issues
- Error messages on opening screen
What do the numbers mean?
Power & electrical5
- 50-60 Hz[1]
Vacuum & pumping2
- Includes microscope, monitor, vacuum work holder[3]
Configuration & options9
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
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
What bond head angle does the BJ 820 have?
The BJ 820 is equipped with a 45-degree bond head.[3]
Not publicly documented
The following facts about the BJ 820 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the BJ 820 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 820 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 820 are not on record.
Answerable by: an engineer who operated it or OEM installation records
The process node or technology generation of the BJ 820 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the BJ 820 are on record.
Answerable by: an OEM parts catalog or a service engineer
Sources & citations
Sources (8)Every fact above is drawn from these public sources
- [1]Inventory photo
- [2]Inventory photo
- [3]Inventory photo
- [4]Inventory photo
- [5]Inventory photo
- [6]Inventory photo
- [7]Inventory photo
- [8]H&K GmbH - D nndrahtbonder — bonder.hesse-knipps.com (Oct 10, 2007)web.archive.org
Last updated Oct 3, 2026.
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