MATTSON TECHNOLOGY, INC
2800 BAYVIEW DR., FREMONT, CA 94538 · NAICS 333518
Having inspection records is common for businesses in regulated industries. Data and methodology
Inspection records
Apr 6, 2021#345234991Apr 6, 2021Accident (A) · Partial scope, Safety#345234991$19,1203 viol.3 violations$19,120 in penalties
Inspection #345234991
Dates
- Opened
- Apr 6, 2021
- Closing Conference Date
- Sep 9, 2021
- Contested
- Jan 9, 2022
- Final Order
- Oct 3, 2022
- Closed
- Nov 14, 2022
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 225
- Related Activity
- 1 accident
Violations and Penalties
- Total Violations
- 3
- Violation Types
- 1 serious, 2 other-than-serious
- Initial Penalties
- $19,120
- Penalties on Record
- $19,120
- Site Address
- 47131 Bayside Parkway, Fremont, CA 94538
- Industry
- 334413 Semiconductor and Related Device Manufacturing
Accident Inspection: This inspection record is categorized as an accident inspection in the U.S. Department of Labor OSHA enforcement data. Employers must report work-related fatalities within 8 hours, and work-related inpatient hospitalizations, amputations, or losses of an eye within 24 hours. An accident-related inspection does not by itself determine fault.
Incident Investigation Summaries
Incident investigation summaries linked to this inspection through OSHA's accident and injury enforcement data. These summaries describe the reported incident. The enforcement outcome for the linked inspection is in the inspection details above.
Employee crushes finger while testing machine
Violations
Violation list (3 of 3 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3203(A) Injury and Illness Prevention Program | Other | 2 | 1 | $560 | $560 | Jan 9, 2022 | Oct 3, 2022 | |
| 01002 | 3314(L) The Control of Hazardous Energy for the Cleaning, Repairing, Servicing, Setting-Up, and Adjusting Operations of Prime Movers, Machinery and Equipment, Including Lockout/Tagout | Other | 1 | 6 | $560 | $560 | Jan 9, 2022 | Oct 3, 2022 | |
| 03001 | 3328(G) Machinery and Equipment | Serious | 1 | 1 | $18,000 | $18,000 | Jan 9, 2022 | Oct 3, 2022 |
Feb 21, 2001#125636902Feb 21, 2001Complaint (B) · Partial scope, Health#125636902$9,21015 viol.15 violations$9,210 in penalties
Inspection #125636902
Dates
- Opened
- Feb 21, 2001
- Closing Conference Date
- Apr 26, 2001
- Closed
- Nov 21, 2001
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 350
- Related Activity
- 1 complaint
Violations and Penalties
- Total Violations
- 15
- Violation Types
- 2 serious, 13 other-than-serious
- Initial Penalties
- $15,635
- Penalties on Record
- $9,210
- Site Address
- 3550 West Warren St, Fremont, CA 94538
- Industry
- 333518
Complaint Inspection: This inspection record is categorized as a complaint inspection in the DOL OSHA enforcement data. OSHA can open complaint-driven inspections after receiving safety or health complaints from workers or their representatives.
Violations
Violation list (15 of 15 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3203 Injury and Illness Prevention Program OSHA citation code: 3203 A | Other | 3 | 350 | $560 | $335 | Jun 15, 2001 | - | - |
| 01002 | 5192 Hazardous Waste Operations and Emergency Response OSHA citation code: 5192 P01 | Other | 1 | 6 | $560 | $335 | Jul 31, 2001 | - | - |
| 01003 | 5194 Hazard Communication OSHA citation code: 5194 E01 | Other | 2 | 300 | $420 | $335 | Jun 2, 2001 | - | - |
| 01004 | 3314 The Control of Hazardous Energy for the Cleaning, Repairing, Servicing, Setting-Up, and Adjusting Operations of Prime Movers, Machinery and Equipment, Including Lockout/Tagout OSHA citation code: 3314 F | Other | 1 | 100 | $560 | $335 | May 17, 2001 | - | - |
| 01005 | 3668 Powered Industrial Truck Operator Training OSHA citation code: 3668 F | Other | 2 | 2 | $280 | $225 | Jun 2, 2001 | - | - |
| 01006 | 5144 Respiratory Protection OSHA citation code: 5144 H03 A | Other | 2 | 6 | $280 | $225 | Jun 2, 2001 | - | - |
| 01007 | 2340.16 Work Space About Electric Equipment OSHA citation code: 23400016 B | Other | 11 | 200 | $560 | $335 | May 4, 2001 | - | - |
| 01008 | 2340.22 Identification of Equipment OSHA citation code: 23400022 A | Other | 5 | 200 | $420 | $335 | May 8, 2001 | - | - |
| 01009 | 3661 Brakes and Warning Devices OSHA citation code: 3661 C | Other | 1 | 6 | $375 | $150 | May 8, 2001 | - | - |
| 01010 | 3203 Injury and Illness Prevention Program OSHA citation code: 3203 B | Other | 2 | 5 | $375 | $300 | Jun 2, 2001 | - | - |
| 01011 | 5143 General Requirements of Mechanical Ventilation Systems OSHA citation code: 5143 A05 | Other | 1 | 6 | $375 | $300 | Jun 2, 2001 | - | - |
| 01012 | 14301 Log and Summary of Occupational Injuries and Illnesses OSHA citation code: 14301 B | Other | 3 | 350 | $375 | $300 | Jun 2, 2001 | - | - |
| 01013 | 14001 Employer OSHA citation code: 14001 C | Other | 3 | 350 | $375 | $300 | Jun 2, 2001 | - | - |
| 02001 | 5192 Hazardous Waste Operations and Emergency Response OSHA citation code: 5192 Q01 | Serious | 1 | 5 | $5,060 | $2,700 | Jul 31, 2001 | - | - |
| 03001 | 5144 Respiratory Protection OSHA citation code: 5144 H02 B | Serious | 2 | 2 | $5,060 | $2,700 | May 4, 2001 | - | - |
Feb 16, 1999#125626903Feb 16, 1999Accident (A) · Partial scope, Health#125626903$6,50510 viol.10 violations$6,505 in penalties
Inspection #125626903
Dates
- Opened
- Feb 16, 1999
- Closing Conference Date
- Mar 16, 1999
- Closed
- Sep 30, 1999
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 75
- Related Activity
- 2 accidents
Violations and Penalties
- Total Violations
- 10
- Violation Types
- 2 serious, 8 other-than-serious
- Initial Penalties
- $6,505
- Penalties on Record
- $6,505
- Site Address
- 2800 Bayview Dr., Fremont, CA 94538
- Industry
- 333518
Accident Inspection: This inspection record is categorized as an accident inspection in the U.S. Department of Labor OSHA enforcement data. Employers must report work-related fatalities within 8 hours, and work-related inpatient hospitalizations, amputations, or losses of an eye within 24 hours. An accident-related inspection does not by itself determine fault.
Violations
Violation list (10 of 10 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3203 Injury and Illness Prevention Program OSHA citation code: 3203 A | Other | 1 | 75 | $560 | $560 | Apr 21, 1999 | - | - |
| 01002 | 5192 Hazardous Waste Operations and Emergency Response OSHA citation code: 5192 Q01 | Other | 1 | 75 | $420 | $420 | Jun 1, 1999 | - | - |
| 01003 | 5194 Hazard Communication OSHA citation code: 5194 E01 | Other | 1 | 75 | $0 | $0 | Jun 1, 1999 | - | - |
| 01004 | 6151 Portable Fire Extinguishers OSHA citation code: 6151 A | Other | 1 | 75 | $375 | $375 | Jun 1, 1999 | - | - |
| 01005 | 3329 Pipe Lines OSHA citation code: 3329 D | Other | 1 | 2 | $420 | $420 | Mar 26, 1999 | - | - |
| 01006 | 3314 The Control of Hazardous Energy for the Cleaning, Repairing, Servicing, Setting-Up, and Adjusting Operations of Prime Movers, Machinery and Equipment, Including Lockout/Tagout OSHA citation code: 3314 F | Other | 1 | 15 | $420 | $420 | Jun 21, 1999 | - | - |
| 01007 | 2500.8 Uses Not Permitted OSHA citation code: 25000008 A | Other | 2 | 5 | $280 | $280 | Mar 28, 1999 | - | - |
| 01008 | 3661 Brakes and Warning Devices OSHA citation code: 3661 C | Other | 1 | 75 | $280 | $280 | Mar 28, 1999 | - | - |
| 02001 | 5194 Hazard Communication OSHA citation code: 5194 H01 | Serious | 2 | 75 | $1,875 | $1,875 | Apr 4, 1999 | - | - |
| 03001 | 5162 Emergency Eyewash and Shower Equipment OSHA citation code: 5162 A | Serious | 1 | 10 | $1,875 | $1,875 | Mar 28, 1999 | - | - |
Penalty amounts may differ from final amounts after settlement or judicial review. How to read these records
About these records
A company page groups inspections with the same normalized employer name, city and state; it is not a legal-entity identifier (how pages are grouped).
This page displays public OSHA enforcement data. Status text follows the DOL inspection record first and may include citation-level context when the inspection feed and citation records are out of sync. Penalty amounts shown reflect the latest penalty amounts on record in the DOL database and may differ from initial assessments or final amounts. This is not an official OSHA resource.
OSHA's public enforcement data does not publish a "guilty" or "not guilty" field for inspections. The closest outcome fields available are the citation counts, penalty amounts, contest dates, final-order dates, and the inspection close date shown on this page. How to interpret these status fields. How initial and current penalties are recorded.
OSHA may publish multiple citation rows in the same inspection with the same standard and penalty fields. Separate rows can still differ in OSHA metadata such as citation identifier, recorded instance count, exposed workers, or gravity value. Contest and Final Order columns show citation-level dates from OSHA's enforcement record. A dash means OSHA's record does not currently show that activity for the citation.
Source: U.S. Department of Labor OSHA incident investigation data (`osha_accident` + `osha_accident_injury`). Linked via `rel_insp_nr` to the inspection activity number (exact government key). Injury, body part, source and event values are OSHA's own codes. OSHA states that these fields are not coded according to the requirements under the Occupational Injury and Illness Classification System (OIICS). Only the values present in the OSHA record are listed; an incident with no value that resolves in OSHA's code table shows "Injury details not recorded". Where a record covers several people, each field lists every value recorded across them.
Understanding These Penalties
The maximum penalty for a serious violation in 2025 is $16,550 per violation. For willful violations, the range is $11,823 to $165,514. The current penalty column shows the latest amount on record in OSHA's database for each citation. When the current penalty differs from the initial penalty, OSHA's records show that the amount changed during the enforcement process, but this page does not determine the specific reason for each change. Penalty amounts are set by OSHA and adjusted annually for inflation.
3 inspections, 1999 to 2021. Each row is one inspection; point at or tap a row for its dates and totals.
Source: DOL OSHA enforcement data (inspections and violations), linked via activity_nr (exact government key).
Penalty changes: Amounts shown reflect what OSHA's enforcement record publishes. The reason for any change is not stated unless OSHA's record explicitly says so.
Standards cited
Industry comparison
Machinery Manufacturing, 18,731 employers with OSHA inspections. Arithmetic from DOL records.