Electronic Restoration >> Water Damage Guitar Restoration Tips

For detailed instructions on PEM requirements and test procedures, including screening, qualification, DPA test procedure, additional evaluation analysis, derating, and handling and storage guidelines refer to Instructions for PEM Selection, Screening,  Water Damage Guitar Restoration Tips and Qualification, PEM- INST-001.

Refer to paragraph 6.0, Instructions, pages 4 through 10, Water Damage Guitar Restoration Tips  of Section 1 for general part requirements applicable to all part types.1.2/ PEMs qualified according to this document are intended for operation within the manufacturer's data sheet limits. 

Any uprating and use of PEMs outside the manufacturer's specified range, particularly the temperature limits, is not acceptable.1.3/ Radiation Lot Acceptance Testing (RLAT) of PEMs shall be performed independently of any data that may exist for equivalent or similar hermetically sealed devices,  Water Damage Guitar Restoration Tips and should be performed under the direction of the project radiation specialist. 

This is necessary as market conditions may drive unannounced process changes, Water Damage Guitar Restoration Tips  creating differences in radiation response.1.4/ Most of the requirements described in this document are also applicable to commercial discrete and hybrid semiconductor devices encapsulated in plastics.

However, for some parts tailoring of the screening, qualification, and DPA procedures might be necessary. Water Damage Guitar Restoration Tips  In this case adjustments of the procedures for a particular part type should be done by the project parts engineer and approved by code 562. For discrete semiconductor devices refer to MIL-STD-750 for the appropriate test methods.

2/ Qualification by Flight History or similarity is not acceptable for PEMs.  Water Damage Guitar Restoration Tips Commercial PEM manufacturers are known to produce the same part number with die sourced from different wafer lots having different die revisions. 

The same part number may also be made by multiple production plants and processed according to requirements that vary between wafer and assembly plants.3/ DPA for PEMs shall focus on three major areas of concerns: 1) integrity of the package, Water Damage Guitar Restoration Tips  2) quality of assembly, and 3) defects in the die. 

This analysis shall also evaluate package and die-level homogeneity of the lot. When obvious gross defects are revealed during DPA, it is usually anindication that manufacturer's processes are out of control, Water Damage Guitar Restoration Tips and a replacement of the lot might be required. Therefore, it is recommended that DPA be performed prior to screening and qualification of the lot. 

Additional evaluations might be necessary to further mitigate risks associated with the use of PEMs (refer to section 6 of PEM-INST-001). Screening is performed on 100% of flight parts.1.2/ Historically,  Water Damage Guitar Restoration Tips only parts with tight lot-specific controls imposed during manufacturing had been allowed for applications in level 1 projects. 

Such a control is impossible for PEMs, and the suggested screening procedures are not considered as a substitute for manufacturing control, Water Damage Guitar Restoration Tips but rather as risk mitigation measures.1.3/ It is the responsibility of the project parts engineer to submit screening test results to Code 562 for logging into the Code 562 PEM database.

2/ It is recommended to combine the incoming/outgoing visual inspections with the serialization and packaging to reduce handling  Water Damage Guitar Restoration Tips and possible damage to the parts. Serialization should be performed in such a way to allow a topside C-SAM inspection. 

Flight parts should be handled and stored in a manner to prevent mechanical and ESD damage, contamination, and moisture absorption (see Section 8 of PEM-INST-001).3/ To minimize handling,  Water Damage Guitar Restoration Tips only a top view X-ray inspection is required. Focus to inspect for wire sweeping and obvious defects in the part. 

Depending on the results of the top view X-ray and/or part construction, a side view may be required.4/ Acoustic Microscopy (C-SAM)4.1/ General. Acoustic microscopy is performed to screen out defects at critical die surface and lead tip wire-bond areas of the parts and screening,  Water Damage Guitar Restoration Tips except for power devices, is performed only at the topside.

4.2/ Coated Die. Topside of the internal portion of the leads is inspected in PEMs with polymer die coating. Inspection of the die area is not required, Water Damage Guitar Restoration Tips as the die coating has a low acoustic impedance that appears as a false delamination. 4.3/ Power Devices. 

For power parts, the bottom side inspection of die attachment might be replaced with the thermal impedance measurements.4.4/ Rejection Criteria . Any measurable amount of delamination between molding compound and the die surface.   Water Damage Guitar Restoration Tips Any delaminations on the leads at wire bond areas.  

Delaminations extending more than 2/3 the length of internal part of the leads.5/ Electrical Measurements 5.1/ Special Testing. In addition to parametric and functional measurements per data sheets, supplement and/or innovative testing techniques (e.g. IDDQ leakage currents,  Water Damage Guitar Restoration Tips thermal impedance, output noise, etc.) can be used to select better quality parts from the lot (cherry pick) as flight candidates. 

These techniques should be certified and approved by Code 562.5.2/ Failure modes (parametric or catastrophic) should be recorded for each failed part.6/ Engineering review.6.1/  Water Damage Guitar Restoration Tips More than 10% CSAM rejects might require additional evaluation of thermo-mechanical integrity of the lot or its replacement.

6.2/ Most established PEMs manufacturers guarantees 3-sigma level process minimum, which means that less than 0.27% of the parts can be out of specification. Excessive fall outs during initial electrical measurements at room temperature might be due to a poor quality of the lot,  Water Damage Guitar Restoration Tips effect of temperature cycling performed before electrical measurements, or it might be an indication of problems with the testing lab. 

When excessive rejects are experienced, the project PE decides whether a lot replacement  Water Damage Guitar Restoration Tips or additional evaluation is needed based on observed failure modes and results of failure analysis. Excessive rejects during initial electrical measurements might be a legitimate cause for lot replacement.7/ Burn-in (BI)7.1/ General. 

Burn-in is a complex, product-specific test and if possible should be conducted by the manufacturer of the part. If a user performs this test,special care should be taken not to exceed maximum current, voltage,  Water Damage Guitar Restoration Tips and die temperature limits.7.2/ Burn-in Temperature. 

The BI temperature is a "stress ” temperature used to precipitate failure of defective parts and is typically much higher than the operational temperature of the part,  Water Damage Guitar Restoration Tips where the characteristics are guaranteed to remain within the data sheet limits. 

Most PEM manufacturers use temperatures in the range from 125 °C to 150 °C to periodically perform BI to monitor quality of their product. However, Water Damage Guitar Restoration Tips  if the parts engineer is unable to justify the suitability of burn-in at 125 °C, the burn-in ambient temperature shall be limited to the maximum operating temperature per the device specifications provided by the manufacturer.

7.3/ Junction Temperature. The junction temperature during BI testing should not exceed the absolute maximum rated junction temperature for the part.7.4/ Molding Material Glass Transition Temperature. When the die temperature is close to or exceeds the glass transition temperature (Tg) of the molding compound (MC), Water Damage Guitar Restoration Tips electrical and mechanical properties of MC may change significantly and new degradation mechanisms may cause failures of the part. 

For most molding compounds, Tg values exceed 140 to 150 °C, which gives a necessary temperature margin for 125 °C BI. Reliability of the PEMs, which are manufactured with low-Tg molding compounds (Tg < 120 °C), is difficult to assess Water Damage Guitar Restoration Tips , and such parts are not recommended for space projects without additional extensive analysis and testing. Glass transition temperature measurements are recommended prior to BI if usage of low-Tg molding compound for the lot is suspected.

Soot

Top of Form RICHLAND, Wash. – Cutting the amount of short-lived, climate-warming emissions such as Fire Damage Soot and methane in our skies won't limit global warming as much as previous studies have suggested, a new analysis shows.

The study also found a comprehensive climate policy (includin  read more..

Lead Was Used For Many Years In Plumbing

Testing your home's drinking water is the only way to confirm if lead is present. Most water systems test for lead at a certain number of homes as a regular part of water monitoring. These tests give a system-wide picture of whether or not corrosion is being controlled but do not reflect conditions   read more..

Work Related Lead Exposure

Laboratories performing lead analyses on blood samples drawn in California are required by law to report electronically all results to the California Department of Public Health (CDPH). The Occupational Lead Poisoning Prevention Program (OLPPP) collects test results for adults 16 years of age and ov  read more..

How To Restore Water Damaged Archive Photos

The New Orleans Charter is the product resulting from the two symposia: Museums in Historic Buildings held in Montreal, Quebec (1990) and New Orleans, Louisiana (1991) and Document restoration How To Restore Water Damaged Archive Photos co-sponsored by the American Institute for Conservation of Historic and Artistic Works (AIC) and The Association   read more..

Fire Damage

Any case of fire damage that the fire department or the use of fire sprinklers have been involved will require a certain amount of Dehumidification Fire Damage. When a typical fire breaks out and the fire department arrives, in almost every case water will be employed to put out the fire. The utilization of the water  read more..

Basement Drying

Unprotected building occupants and water restoration workers should be evacuated from the Sewage Cleanup Basement Drying affected areas during the beginning stages of decontamination, sewage cleaning, and disinfection, such as until the sewage has been completely removed and the disinfectants applied. The water restor  read more..

Carpet Cleaning Tips

Ground Elevations Corresponding to Inland Limits of V Zones and Coastal A Zones (based on 1 percent annual chance stillwater elevations published by FEMA, October 3, 2005) 1 Percent Annual Chance Stillwater Elevation (ft NGVD)Jackson, Gulf of Mexico - Jackson, Back Bay - Harrison, Gulf of Mexico - H  read more..

Basement Drying

Water extraction, Basement Drying


Places that are often or always damp can be hard to maintain completely free of mold. If there's some mold in the shower or elsewhere in the bathroom that seems to reappear, increasing ventilation (running a fan or opening a win  read more..

Hazardous Materials From Clean Up Flood Damage

In all likelihood, hazardous materials will be encountered during the cleanup phase of the flood recovery effort: containers and other vessels that may hold materials that can either pose an immediate risk to cleanup crews if disturbed or might be classified as a hazardous waste for disposal purpose  read more..

Physical Symptoms Of A Meth Lab In Your Rental Hou

Walls, ceilings, floors, and woodwork shall be coated with paint or polyurethane after cleaning toisolate the remaining meth residue. Some studies show that meth can "wick” through paint. Apply atleast two coats of high quality paint or polyurethane. A primer coat Meth Lab Cleanup Physical Symptoms Of A Meth Lab In Your Rental Hou will improve adhesion   read more..